22221222200121 has 16 divisors (see below), whose sum is σ = 33983151580544. Its totient is φ = 12652000671744.

The previous prime is 22221222200119. The next prime is 22221222200123. The reversal of 22221222200121 is 12100222212222.

It is an interprime number because it is at equal distance from previous prime (22221222200119) and next prime (22221222200123).

It is not a de Polignac number, because 22221222200121 - 2¹ = 22221222200119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221222200123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910018440 + ... + 1910030073.

It is an arithmetic number, because the mean of its divisors is an integer number (2123946973784).

Almost surely, 2^{22221222200121} is an apocalyptic number.

22221222200121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22221222200121 is a deficient number, since it is larger than the sum of its proper divisors (11761929380423).

22221222200121 is a wasteful number, since it uses less digits than its factorization.

22221222200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820048800.

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

Adding to 22221222200121 its reverse (12100222212222), we get a palindrome (34321444412343).

The spelling of 22221222200121 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, one hundred twenty-one".