2122220100021 has 32 divisors (see below), whose sum is σ = 3349248860160. Its totient is φ = 1169523009984.

The previous prime is 2122220100001. The next prime is 2122220100067. The reversal of 2122220100021 is 1200010222212.

It is not a de Polignac number, because 2122220100021 - 2¹⁰ = 2122220098997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122220100001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1493415 + ... + 2544548.

It is an arithmetic number, because the mean of its divisors is an integer number (104664026880).

Almost surely, 2^{2122220100021} is an apocalyptic number.

2122220100021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2122220100021 is a deficient number, since it is larger than the sum of its proper divisors (1227028760139).

2122220100021 is a wasteful number, since it uses less digits than its factorization.

2122220100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038865.

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

Adding to 2122220100021 its reverse (1200010222212), we get a palindrome (3322230322233).

The spelling of 2122220100021 in words is "two trillion, one hundred twenty-two billion, two hundred twenty million, one hundred thousand, twenty-one".