220222121021 has 64 divisors (see below), whose sum is σ = 284504555520. Its totient is φ = 166017223680.

The previous prime is 220222121003. The next prime is 220222121051. The reversal of 220222121021 is 120121222022.

It is a happy number.

It is not a de Polignac number, because 220222121021 - 2¹⁸ = 220221858877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222121051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 92490251 + ... + 92492631.

It is an arithmetic number, because the mean of its divisors is an integer number (4445383680).

Almost surely, 2^220222121021 is an apocalyptic number.

It is an amenable number.

220222121021 is a deficient number, since it is larger than the sum of its proper divisors (64282434499).

220222121021 is a wasteful number, since it uses less digits than its factorization.

220222121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220222121021 its reverse (120121222022), we get a palindrome (340343343043).

The spelling of 220222121021 in words is "two hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".