31211132132 has 6 divisors (see below), whose sum is σ = 54619481238. Its totient is φ = 15605566064.

The previous prime is 31211132123. The next prime is 31211132137. The reversal of 31211132132 is 23123111213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19868030116 + 11343102016 = 140954^2 + 106504^2 .

It is a super-2 number, since 2×31211132132² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31211132137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3901391513 + ... + 3901391520.

It is an arithmetic number, because the mean of its divisors is an integer number (9103246873).

Almost surely, 2^31211132132 is an apocalyptic number.

It is an amenable number.

31211132132 is a deficient number, since it is larger than the sum of its proper divisors (23408349106).

31211132132 is a wasteful number, since it uses less digits than its factorization.

31211132132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7802783037 (or 7802783035 counting only the distinct ones).

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

Adding to 31211132132 its reverse (23123111213), we get a palindrome (54334243345).

The spelling of 31211132132 in words is "thirty-one billion, two hundred eleven million, one hundred thirty-two thousand, one hundred thirty-two".