Search a number
-
+
21000220221037 is a prime number
BaseRepresentation
bin1001100011001011111101…
…01010101001111001101101
32202100121020110021022121111
410301211332222221321231
510223031422334033122
6112355211252432021
74265134014434521
oct461457652517155
982317213238544
1021000220221037
116767163927292
122431b97318611
13b9440a096785
145285b7a2bd81
152663e5aecd77
hex13197eaa9e6d

21000220221037 has 2 divisors, whose sum is σ = 21000220221038. Its totient is φ = 21000220221036.

The previous prime is 21000220221031. The next prime is 21000220221067. The reversal of 21000220221037 is 73012202200012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19231548973641 + 1768671247396 = 4385379^2 + 1329914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21000220221037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000220220999 and 21000220221017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000220221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500110110518 + 10500110110519.

It is an arithmetic number, because the mean of its divisors is an integer number (10500110110519).

Almost surely, 221000220221037 is an apocalyptic number.

It is an amenable number.

21000220221037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000220221037 is an equidigital number, since it uses as much as digits as its factorization.

21000220221037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 21000220221037 its reverse (73012202200012), we get a palindrome (94012422421049).

The spelling of 21000220221037 in words is "twenty-one trillion, two hundred twenty million, two hundred twenty-one thousand, thirty-seven".