31021032000000 has 560 divisors, whose sum is σ = 118059082574400. Its totient is φ = 7090483200000.

The previous prime is 31021031999939. The next prime is 31021032000053. The reversal of 31021032000000 is 23012013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31021032000000.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 167907676 + ... + 168092324.

Almost surely, 2^{31021032000000} is an apocalyptic number.

31021032000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31021032000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59029541287200).

31021032000000 is an abundant number, since it is smaller than the sum of its proper divisors (87038050574400).

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

31021032000000 is an frugal number, since it uses more digits than its factorization.

31021032000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184707 (or 184666 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31021032000000 its reverse (23012013), we get a palindrome (31021055012013).

The spelling of 31021032000000 in words is "thirty-one trillion, twenty-one billion, thirty-two million", and thus it is an aban number and an uban number.