231122211011 has 2 divisors, whose sum is σ = 231122211012. Its totient is φ = 231122211010.

The previous prime is 231122211007. The next prime is 231122211017. The reversal of 231122211011 is 110112221132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231122211011 - 2² = 231122211007 is a prime.

It is a super-2 number, since 2×231122211011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231122211017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561105505 + 115561105506.

It is an arithmetic number, because the mean of its divisors is an integer number (115561105506).

Almost surely, 2^231122211011 is an apocalyptic number.

231122211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

231122211011 is an equidigital number, since it uses as much as digits as its factorization.

231122211011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 231122211011 its reverse (110112221132), we get a palindrome (341234432143).

The spelling of 231122211011 in words is "two hundred thirty-one billion, one hundred twenty-two million, two hundred eleven thousand, eleven".