31132211123 has 12 divisors (see below), whose sum is σ = 34117385400. Its totient is φ = 28391178816.

The previous prime is 31132211119. The next prime is 31132211141. The reversal of 31132211123 is 32111223113.

It is a happy number.

It is not a de Polignac number, because 31132211123 - 2² = 31132211119 is a prime.

It is a super-2 number, since 2×31132211123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31132211095 and 31132211104.

It is not an unprimeable number, because it can be changed into a prime (31132211153) 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, 1095698 + ... + 1123751.

It is an arithmetic number, because the mean of its divisors is an integer number (2843115450).

Almost surely, 2^31132211123 is an apocalyptic number.

31132211123 is a deficient number, since it is larger than the sum of its proper divisors (2985174277).

31132211123 is a wasteful number, since it uses less digits than its factorization.

31132211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219558 (or 2219545 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 31132211123 its reverse (32111223113), we get a palindrome (63243434236).

The spelling of 31132211123 in words is "thirty-one billion, one hundred thirty-two million, two hundred eleven thousand, one hundred twenty-three".