Search a number
-
+
1213131120211 is a prime number
BaseRepresentation
bin10001101001110100001…
…111111101111001010011
311021222022012020010120001
4101221310033331321103
5124333443031321321
62325145454030431
7153434343245233
oct21516417757123
94258265203501
101213131120211
1142853898905a
121771431a8417
138a522ba801a
1442a04465cc3
15218528dcc91
hex11a743fde53

1213131120211 has 2 divisors, whose sum is σ = 1213131120212. Its totient is φ = 1213131120210.

The previous prime is 1213131120119. The next prime is 1213131120217. The reversal of 1213131120211 is 1120211313121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1120211313121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1213131120211 is a prime.

It is a super-2 number, since 2×12131311202112 (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213131120217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606565560105 + 606565560106.

It is an arithmetic number, because the mean of its divisors is an integer number (606565560106).

Almost surely, 21213131120211 is an apocalyptic number.

1213131120211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213131120211 is an equidigital number, since it uses as much as digits as its factorization.

1213131120211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1213131120211 its reverse (1120211313121), we get a palindrome (2333342433332).

The spelling of 1213131120211 in words is "one trillion, two hundred thirteen billion, one hundred thirty-one million, one hundred twenty thousand, two hundred eleven".