31221011122113 has 8 divisors (see below), whose sum is σ = 41635357948800. Its totient is φ = 20810335855088.

The previous prime is 31221011122073. The next prime is 31221011122127. The reversal of 31221011122113 is 31122111012213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31221011122113 - 2³⁴ = 31203831252929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31221011122113.

It is not an unprimeable number, because it can be changed into a prime (31221011122193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917870073 + ... + 917904086.

It is an arithmetic number, because the mean of its divisors is an integer number (5204419743600).

Almost surely, 2^{31221011122113} is an apocalyptic number.

It is an amenable number.

31221011122113 is a deficient number, since it is larger than the sum of its proper divisors (10414346826687).

31221011122113 is a wasteful number, since it uses less digits than its factorization.

31221011122113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835779831.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 31221011122113 its reverse (31122111012213), we get a palindrome (62343122134326).

The spelling of 31221011122113 in words is "thirty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty-two thousand, one hundred thirteen".