220031423121 has 4 divisors (see below), whose sum is σ = 293375230832. Its totient is φ = 146687615412.

The previous prime is 220031423119. The next prime is 220031423141. The reversal of 220031423121 is 121324130022.

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 not a de Polignac number, because 220031423121 - 2¹ = 220031423119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220031423111) 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, 36671903851 + ... + 36671903856.

It is an arithmetic number, because the mean of its divisors is an integer number (73343807708).

Almost surely, 2^220031423121 is an apocalyptic number.

It is an amenable number.

220031423121 is a deficient number, since it is larger than the sum of its proper divisors (73343807711).

220031423121 is an equidigital number, since it uses as much as digits as its factorization.

220031423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73343807710.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 220031423121 its reverse (121324130022), we get a palindrome (341355553143).

The spelling of 220031423121 in words is "two hundred twenty billion, thirty-one million, four hundred twenty-three thousand, one hundred twenty-one".