131211222402123 has 12 divisors (see below), whose sum is σ = 189528598367368. Its totient is φ = 87473558828160.

The previous prime is 131211222402109. The next prime is 131211222402133. The reversal of 131211222402123 is 321204222112131.

131211222402123 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 11 + 222 + 402 + 1 + 23 = 666.

It is not a de Polignac number, because 131211222402123 - 2⁸ = 131211222401867 is a prime.

It is a super-2 number, since 2×131211222402123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131211222402133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47708038 + ... + 50383323.

Almost surely, 2^{131211222402123} is an apocalyptic number.

131211222402123 is a deficient number, since it is larger than the sum of its proper divisors (58317375965245).

131211222402123 is a wasteful number, since it uses less digits than its factorization.

131211222402123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98239994 (or 98239991 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 131211222402123 its reverse (321204222112131), we get a palindrome (452415444514254).

The spelling of 131211222402123 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twenty-two million, four hundred two thousand, one hundred twenty-three".