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21112020001181 is a prime number
BaseRepresentation
bin1001100110011100001100…
…11100111110000110011101
32202202021210222021121012102
410303032012130332012131
510231344404110014211
6112522421134014445
74306202352045434
oct463160634760635
982667728247172
1021112020001181
1167aa6149a08aa
12244b798947425
13ba1b16407635
1452db81c6c11b
1526928ac08a3b
hex13338673e19d

21112020001181 has 2 divisors, whose sum is σ = 21112020001182. Its totient is φ = 21112020001180.

The previous prime is 21112020001159. The next prime is 21112020001201. The reversal of 21112020001181 is 18110002021112.

It is a happy number.

It is an a-pointer prime, because the next prime (21112020001201) can be obtained adding 21112020001181 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13543386257956 + 7568633743225 = 3680134^2 + 2751115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21112020001181 is a prime.

It is a super-2 number, since 2×211120200011812 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112020031181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010000590 + 10556010000591.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010000591).

Almost surely, 221112020001181 is an apocalyptic number.

It is an amenable number.

21112020001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020001181 is an equidigital number, since it uses as much as digits as its factorization.

21112020001181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 21112020001181 its reverse (18110002021112), we get a palindrome (39222022022293).

The spelling of 21112020001181 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one thousand, one hundred eighty-one".