220131013121 has 4 divisors (see below), whose sum is σ = 220152192000. Its totient is φ = 220109834244.

The previous prime is 220131013061. The next prime is 220131013147. The reversal of 220131013121 is 121310131022.

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-220131013121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220131013121.

It is not an unprimeable number, because it can be changed into a prime (220131003121) 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, 10573841 + ... + 10594638.

It is an arithmetic number, because the mean of its divisors is an integer number (55038048000).

Almost surely, 2^220131013121 is an apocalyptic number.

It is an amenable number.

220131013121 is a deficient number, since it is larger than the sum of its proper divisors (21178879).

220131013121 is a wasteful number, since it uses less digits than its factorization.

220131013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21178878.

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

Adding to 220131013121 its reverse (121310131022), we get a palindrome (341441144143).

The spelling of 220131013121 in words is "two hundred twenty billion, one hundred thirty-one million, thirteen thousand, one hundred twenty-one".