31111021132 has 12 divisors (see below), whose sum is σ = 54537041160. Its totient is φ = 15529009376.

The previous prime is 31111021129. The next prime is 31111021153. The reversal of 31111021132 is 23112011113.

It is a happy number.

It is a super-2 number, since 2×31111021132² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6622657 + ... + 6627352.

It is an arithmetic number, because the mean of its divisors is an integer number (4544753430).

Almost surely, 2^31111021132 is an apocalyptic number.

It is an amenable number.

31111021132 is a deficient number, since it is larger than the sum of its proper divisors (23426020028).

31111021132 is a wasteful number, since it uses less digits than its factorization.

31111021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13250600 (or 13250598 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31111021132 its reverse (23112011113), we get a palindrome (54223032245).

The spelling of 31111021132 in words is "thirty-one billion, one hundred eleven million, twenty-one thousand, one hundred thirty-two".