31211403112 has 16 divisors (see below), whose sum is σ = 59882343840. Its totient is φ = 15242778096.

The previous prime is 31211403109. The next prime is 31211403133. The reversal of 31211403112 is 21130411213.

It is a self number, because there is not a number n which added to its sum of digits gives 31211403112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45365068 + ... + 45365755.

It is an arithmetic number, because the mean of its divisors is an integer number (3742646490).

Almost surely, 2^31211403112 is an apocalyptic number.

It is an amenable number.

31211403112 is a deficient number, since it is larger than the sum of its proper divisors (28670940728).

31211403112 is a wasteful number, since it uses less digits than its factorization.

31211403112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90730872 (or 90730868 counting only the distinct ones).

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

Adding to 31211403112 its reverse (21130411213), we get a palindrome (52341814325).

The spelling of 31211403112 in words is "thirty-one billion, two hundred eleven million, four hundred three thousand, one hundred twelve".