220231320221 has 16 divisors (see below), whose sum is σ = 242737941888. Its totient is φ = 198140712000.

The previous prime is 220231320173. The next prime is 220231320233. The reversal of 220231320221 is 122023132022.

It is a happy number.

It is not a de Polignac number, because 220231320221 - 2²² = 220227125917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220231320193 and 220231320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220231320271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2549480 + ... + 2634446.

It is an arithmetic number, because the mean of its divisors is an integer number (15171121368).

Almost surely, 2^220231320221 is an apocalyptic number.

It is an amenable number.

220231320221 is a deficient number, since it is larger than the sum of its proper divisors (22506621667).

220231320221 is a wasteful number, since it uses less digits than its factorization.

220231320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87412.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 220231320221 its reverse (122023132022), we get a palindrome (342254452243).

The spelling of 220231320221 in words is "two hundred twenty billion, two hundred thirty-one million, three hundred twenty thousand, two hundred twenty-one".