31021142000 has 80 divisors (see below), whose sum is σ = 77428925184. Its totient is φ = 12008160000.

The previous prime is 31021141909. The next prime is 31021142027. The reversal of 31021142000 is 24112013.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×31021142000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188171 + ... + 312170.

Almost surely, 2^31021142000 is an apocalyptic number.

It is an amenable number.

31021142000 is an abundant number, since it is smaller than the sum of its proper divisors (46407783184).

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

31021142000 is a wasteful number, since it uses less digits than its factorization.

31021142000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500395 (or 500379 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31021142000 its reverse (24112013), we get a palindrome (31045254013).

The spelling of 31021142000 in words is "thirty-one billion, twenty-one million, one hundred forty-two thousand".