31120101011213 has 4 divisors (see below), whose sum is σ = 31120168934400. Its totient is φ = 31120033088028.

The previous prime is 31120101011191. The next prime is 31120101011291. The reversal of 31120101011213 is 31211010102113.

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 31120101011213 - 2⁶ = 31120101011149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31120101011191 and 31120101011200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120101011113) 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, 33269645 + ... + 34192242.

It is an arithmetic number, because the mean of its divisors is an integer number (7780042233600).

Almost surely, 2^{31120101011213} is an apocalyptic number.

It is an amenable number.

31120101011213 is a deficient number, since it is larger than the sum of its proper divisors (67923187).

31120101011213 is an equidigital number, since it uses as much as digits as its factorization.

31120101011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67923186.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31120101011213 its reverse (31211010102113), we get a palindrome (62331111113326).

The spelling of 31120101011213 in words is "thirty-one trillion, one hundred twenty billion, one hundred one million, eleven thousand, two hundred thirteen".