31201022020 has 48 divisors (see below), whose sum is σ = 74999127168. Its totient is φ = 10680825600.

The previous prime is 31201022003. The next prime is 31201022023. The reversal of 31201022020 is 2022010213.

It is not an unprimeable number, because it can be changed into a prime (31201022023) 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, 83281 + ... + 263320.

It is an arithmetic number, because the mean of its divisors is an integer number (1562481816).

Almost surely, 2^31201022020 is an apocalyptic number.

It is an amenable number.

31201022020 is an abundant number, since it is smaller than the sum of its proper divisors (43798105148).

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

31201022020 is a wasteful number, since it uses less digits than its factorization.

31201022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347260 (or 347258 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 31201022020 its reverse (2022010213), we get a palindrome (33223032233).

The spelling of 31201022020 in words is "thirty-one billion, two hundred one million, twenty-two thousand, twenty".