31121202200113 has 4 divisors (see below), whose sum is σ = 32474297947968. Its totient is φ = 29768106452260.

The previous prime is 31121202200063. The next prime is 31121202200117. The reversal of 31121202200113 is 31100220212113.

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 a de Polignac number, because none of the positive numbers 2^k-31121202200113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31121202200117) 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, 676547873893 + ... + 676547873938.

It is an arithmetic number, because the mean of its divisors is an integer number (8118574486992).

Almost surely, 2^{31121202200113} is an apocalyptic number.

It is an amenable number.

31121202200113 is a deficient number, since it is larger than the sum of its proper divisors (1353095747855).

31121202200113 is a wasteful number, since it uses less digits than its factorization.

31121202200113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353095747854.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31121202200113 its reverse (31100220212113), we get a palindrome (62221422412226).

The spelling of 31121202200113 in words is "thirty-one trillion, one hundred twenty-one billion, two hundred two million, two hundred thousand, one hundred thirteen".