31210130020 has 48 divisors (see below), whose sum is σ = 68105640960. Its totient is φ = 11999465856.

The previous prime is 31210129987. The next prime is 31210130027. The reversal of 31210130020 is 2003101213.

It is not an unprimeable number, because it can be changed into a prime (31210130027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8689 + ... + 249991.

It is an arithmetic number, because the mean of its divisors is an integer number (1418867520).

Almost surely, 2^31210130020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31210130020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34052820480).

31210130020 is an abundant number, since it is smaller than the sum of its proper divisors (36895510940).

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

31210130020 is a wasteful number, since it uses less digits than its factorization.

31210130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241564 (or 241562 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31210130020 its reverse (2003101213), we get a palindrome (33213231233).

The spelling of 31210130020 in words is "thirty-one billion, two hundred ten million, one hundred thirty thousand, twenty".