31221211132 has 12 divisors (see below), whose sum is σ = 55200389440. Its totient is φ = 15449671296.

The previous prime is 31221211097. The next prime is 31221211139. The reversal of 31221211132 is 23111212213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221211139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40233132 + ... + 40233907.

Almost surely, 2^31221211132 is an apocalyptic number.

It is an amenable number.

31221211132 is a deficient number, since it is larger than the sum of its proper divisors (23979178308).

31221211132 is a wasteful number, since it uses less digits than its factorization.

31221211132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80467140 (or 80467138 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 31221211132 its reverse (23111212213), we get a palindrome (54332423345).

The spelling of 31221211132 in words is "thirty-one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred thirty-two".