31020321130 has 8 divisors (see below), whose sum is σ = 55836578052. Its totient is φ = 12408128448.

The previous prime is 31020321103. The next prime is 31020321161. The reversal of 31020321130 is 3112302013.

It can be written as a sum of positive squares in 2 ways, for example, as 29404361529 + 1615959601 = 171477^2 + 40199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551016047 + ... + 1551016066.

Almost surely, 2^31020321130 is an apocalyptic number.

31020321130 is a deficient number, since it is larger than the sum of its proper divisors (24816256922).

31020321130 is a wasteful number, since it uses less digits than its factorization.

31020321130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102032120.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31020321130 its reverse (3112302013), we get a palindrome (34132623143).

The spelling of 31020321130 in words is "thirty-one billion, twenty million, three hundred twenty-one thousand, one hundred thirty".