220031123221 has 24 divisors (see below), whose sum is σ = 272337402624. Its totient is φ = 174063764160.

The previous prime is 220031123209. The next prime is 220031123261. The reversal of 220031123221 is 122321130022.

It is not a de Polignac number, because 220031123221 - 2⁷ = 220031123093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220031123261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11781631 + ... + 11800291.

It is an arithmetic number, because the mean of its divisors is an integer number (11347391776).

Almost surely, 2^220031123221 is an apocalyptic number.

It is an amenable number.

220031123221 is a deficient number, since it is larger than the sum of its proper divisors (52306279403).

220031123221 is a wasteful number, since it uses less digits than its factorization.

220031123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28661 (or 28648 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 220031123221 its reverse (122321130022), we get a palindrome (342352253243).

The spelling of 220031123221 in words is "two hundred twenty billion, thirty-one million, one hundred twenty-three thousand, two hundred twenty-one".