31211031122123 has 16 divisors (see below), whose sum is σ = 33267915653280. Its totient is φ = 29224828636416.

The previous prime is 31211031122113. The next prime is 31211031122153. The reversal of 31211031122123 is 32122113011213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31211031122123 - 2¹² = 31211031118027 is a prime.

It is a super-2 number, since 2×31211031122123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31211031122113) 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, 47044586 + ... + 47703407.

It is an arithmetic number, because the mean of its divisors is an integer number (2079244728330).

Almost surely, 2^{31211031122123} is an apocalyptic number.

31211031122123 is a deficient number, since it is larger than the sum of its proper divisors (2056884531157).

31211031122123 is a wasteful number, since it uses less digits than its factorization.

31211031122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94748366.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31211031122123 its reverse (32122113011213), we get a palindrome (63333144133336).

The spelling of 31211031122123 in words is "thirty-one trillion, two hundred eleven billion, thirty-one million, one hundred twenty-two thousand, one hundred twenty-three".