31201332113 has 4 divisors (see below), whose sum is σ = 35658665280. Its totient is φ = 26743998948.

The previous prime is 31201332103. The next prime is 31201332121. The reversal of 31201332113 is 31123310213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31123310213 = 15649 ⋅1988837.

It is a cyclic number.

It is not a de Polignac number, because 31201332113 - 2²² = 31197137809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31201332103) 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 3 ways as a sum of consecutive naturals, for example, 2228666573 + ... + 2228666586.

It is an arithmetic number, because the mean of its divisors is an integer number (8914666320).

Almost surely, 2^31201332113 is an apocalyptic number.

It is an amenable number.

31201332113 is a deficient number, since it is larger than the sum of its proper divisors (4457333167).

31201332113 is an equidigital number, since it uses as much as digits as its factorization.

31201332113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457333166.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31201332113 its reverse (31123310213), we get a palindrome (62324642326).

The spelling of 31201332113 in words is "thirty-one billion, two hundred one million, three hundred thirty-two thousand, one hundred thirteen".