122011311231 has 16 divisors (see below), whose sum is σ = 180977163520. Its totient is φ = 81242024760.

The previous prime is 122011311187. The next prime is 122011311251. The reversal of 122011311231 is 132113110221.

122011311231 is a `hidden beast` number, since 122 + 0 + 1 + 1 + 311 + 231 = 666.

It is not a de Polignac number, because 122011311231 - 2¹³ = 122011303039 is a prime.

It is a super-2 number, since 2×122011311231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122011311251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2723185 + ... + 2767626.

It is an arithmetic number, because the mean of its divisors is an integer number (11311072720).

Almost surely, 2^122011311231 is an apocalyptic number.

122011311231 is a deficient number, since it is larger than the sum of its proper divisors (58965852289).

122011311231 is an equidigital number, since it uses as much as digits as its factorization.

122011311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491643 (or 5491637 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 122011311231 its reverse (132113110221), we get a palindrome (254124421452).

The spelling of 122011311231 in words is "one hundred twenty-two billion, eleven million, three hundred eleven thousand, two hundred thirty-one".