31021200130 has 16 divisors (see below), whose sum is σ = 56036877624. Its totient is φ = 12364320640.

The previous prime is 31021200121. The next prime is 31021200149. The reversal of 31021200130 is 3100212013.

It can be written as a sum of positive squares in 4 ways, for example, as 29101971649 + 1919228481 = 170593^2 + 43809^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31021200130.

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, 5516977 + ... + 5522596.

Almost surely, 2^31021200130 is an apocalyptic number.

31021200130 is a deficient number, since it is larger than the sum of its proper divisors (25015677494).

31021200130 is a wasteful number, since it uses less digits than its factorization.

31021200130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11039861.

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

Adding to 31021200130 its reverse (3100212013), we get a palindrome (34121412143).

The spelling of 31021200130 in words is "thirty-one billion, twenty-one million, two hundred thousand, one hundred thirty".