31220302130 has 8 divisors (see below), whose sum is σ = 56196543852. Its totient is φ = 12488120848.

The previous prime is 31220302123. The next prime is 31220302163. The reversal of 31220302130 is 3120302213.

It can be written as a sum of positive squares in 2 ways, for example, as 30699595369 + 520706761 = 175213^2 + 22819^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31220302099 and 31220302108.

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, 1561015097 + ... + 1561015116.

Almost surely, 2^31220302130 is an apocalyptic number.

31220302130 is a deficient number, since it is larger than the sum of its proper divisors (24976241722).

31220302130 is a wasteful number, since it uses less digits than its factorization.

31220302130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122030220.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31220302130 its reverse (3120302213), we get a palindrome (34340604343).

The spelling of 31220302130 in words is "thirty-one billion, two hundred twenty million, three hundred two thousand, one hundred thirty".