22221202220121 has 16 divisors (see below), whose sum is σ = 29762812244480. Its totient is φ = 14746871007360.

The previous prime is 22221202220051. The next prime is 22221202220123. The reversal of 22221202220121 is 12102220212222.

It is not a de Polignac number, because 22221202220121 - 2⁴¹ = 20022178964569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22221202220123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11033595 + ... + 12891183.

It is an arithmetic number, because the mean of its divisors is an integer number (1860175765280).

Almost surely, 2^{22221202220121} is an apocalyptic number.

It is an amenable number.

22221202220121 is a deficient number, since it is larger than the sum of its proper divisors (7541610024359).

22221202220121 is a wasteful number, since it uses less digits than its factorization.

22221202220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875696.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22221202220121 its reverse (12102220212222), we get a palindrome (34323422432343).

The spelling of 22221202220121 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".