31200220113 has 8 divisors (see below), whose sum is σ = 41720180448. Its totient is φ = 20740203264.

The previous prime is 31200220099. The next prime is 31200220157. The reversal of 31200220113 is 31102200213.

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

It is not a de Polignac number, because 31200220113 - 2⁵ = 31200220081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31200220092 and 31200220101.

It is not an unprimeable number, because it can be changed into a prime (31200220813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14984656 + ... + 14986737.

It is an arithmetic number, because the mean of its divisors is an integer number (5215022556).

Almost surely, 2^31200220113 is an apocalyptic number.

It is an amenable number.

31200220113 is a deficient number, since it is larger than the sum of its proper divisors (10519960335).

31200220113 is a wasteful number, since it uses less digits than its factorization.

31200220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29971743.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31200220113 its reverse (31102200213), we get a palindrome (62302420326).

The spelling of 31200220113 in words is "thirty-one billion, two hundred million, two hundred twenty thousand, one hundred thirteen".