31231123111000 has 64 divisors (see below), whose sum is σ = 73081766890080. Its totient is φ = 12492288764800.

The previous prime is 31231123110953. The next prime is 31231123111081. The reversal of 31231123111000 is 11132113213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105535242 + ... + 105830758.

Almost surely, 2^{31231123111000} is an apocalyptic number.

It is an amenable number.

31231123111000 is an abundant number, since it is smaller than the sum of its proper divisors (41850643779080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231123111000 is a wasteful number, since it uses less digits than its factorization.

31231123111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401221 (or 401207 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31231123111000 its reverse (11132113213), we get a palindrome (31242255224213).

The spelling of 31231123111000 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-three million, one hundred eleven thousand".