31113013201 has 4 divisors (see below), whose sum is σ = 31117456692. Its totient is φ = 31108569712.

The previous prime is 31113013193. The next prime is 31113013231. The reversal of 31113013201 is 10231031113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11189408400 + 19923604801 = 105780^2 + 141151^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113013201 - 2³ = 31113013193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31113013231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211226 + ... + 2225251.

It is an arithmetic number, because the mean of its divisors is an integer number (7779364173).

Almost surely, 2^31113013201 is an apocalyptic number.

It is an amenable number.

31113013201 is a deficient number, since it is larger than the sum of its proper divisors (4443491).

31113013201 is an equidigital number, since it uses as much as digits as its factorization.

31113013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443490.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31113013201 its reverse (10231031113), we get a palindrome (41344044314).

The spelling of 31113013201 in words is "thirty-one billion, one hundred thirteen million, thirteen thousand, two hundred one".