31201201000 has 32 divisors (see below), whose sum is σ = 73010812680. Its totient is φ = 12480480000.

The previous prime is 31201200983. The next prime is 31201201019. The reversal of 31201201000 is 10210213.

It can be written as a sum of positive squares in 4 ways, for example, as 1938993156 + 29262207844 = 44034^2 + 171062^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15599601 + ... + 15601600.

Almost surely, 2^31201201000 is an apocalyptic number.

It is an amenable number.

31201201000 is an abundant number, since it is smaller than the sum of its proper divisors (41809611680).

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

31201201000 is a wasteful number, since it uses less digits than its factorization.

31201201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31201222 (or 31201208 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31201201000 its reverse (10210213), we get a palindrome (31211411213).

The spelling of 31201201000 in words is "thirty-one billion, two hundred one million, two hundred one thousand".