31311103201 has 4 divisors (see below), whose sum is σ = 35784117952. Its totient is φ = 26838088452.

The previous prime is 31311103169. The next prime is 31311103211. The reversal of 31311103201 is 10230111313.

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: 10230111313 = 10639 ⋅961567.

It is not a de Polignac number, because 31311103201 - 2⁵ = 31311103169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311103211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236507365 + ... + 2236507378.

It is an arithmetic number, because the mean of its divisors is an integer number (8946029488).

Almost surely, 2^31311103201 is an apocalyptic number.

It is an amenable number.

31311103201 is a deficient number, since it is larger than the sum of its proper divisors (4473014751).

31311103201 is an equidigital number, since it uses as much as digits as its factorization.

31311103201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473014750.

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

Adding to 31311103201 its reverse (10230111313), we get a palindrome (41541214514).

The spelling of 31311103201 in words is "thirty-one billion, three hundred eleven million, one hundred three thousand, two hundred one".