220122210000021 has 16 divisors (see below), whose sum is σ = 336569112910464. Its totient is φ = 125354822658624.

The previous prime is 220122209999983. The next prime is 220122210000029. The reversal of 220122210000021 is 120000012221022.

It is not a de Polignac number, because 220122210000021 - 2⁹ = 220122209999509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220122210000029) 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, 17887382926 + ... + 17887395231.

It is an arithmetic number, because the mean of its divisors is an integer number (21035569556904).

Almost surely, 2^{220122210000021} is an apocalyptic number.

220122210000021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220122210000021 is a deficient number, since it is larger than the sum of its proper divisors (116446902910443).

220122210000021 is a wasteful number, since it uses less digits than its factorization.

220122210000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35774778460.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220122210000021 its reverse (120000012221022), we get a palindrome (340122222221043).

The spelling of 220122210000021 in words is "two hundred twenty trillion, one hundred twenty-two billion, two hundred ten million, twenty-one", and thus it is an aban number.