31012122113 has 4 divisors (see below), whose sum is σ = 35442425280. Its totient is φ = 26581818948.

The previous prime is 31012122079. The next prime is 31012122161. The reversal of 31012122113 is 31122121013.

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.

It is a cyclic number.

It is not a de Polignac number, because 31012122113 - 2⁸ = 31012121857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31012122091 and 31012122100.

It is not an unprimeable number, because it can be changed into a prime (31012128113) 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, 2215151573 + ... + 2215151586.

It is an arithmetic number, because the mean of its divisors is an integer number (8860606320).

Almost surely, 2^31012122113 is an apocalyptic number.

It is an amenable number.

31012122113 is a deficient number, since it is larger than the sum of its proper divisors (4430303167).

31012122113 is an equidigital number, since it uses as much as digits as its factorization.

31012122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430303166.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31012122113 its reverse (31122121013), we get a palindrome (62134243126).

The spelling of 31012122113 in words is "thirty-one billion, twelve million, one hundred twenty-two thousand, one hundred thirteen".