22122221120021 has 16 divisors (see below), whose sum is σ = 24813175032576. Its totient is φ = 19548194400000.

The previous prime is 22122221120017. The next prime is 22122221120039. The reversal of 22122221120021 is 12002112222122.

It is a cyclic number.

It is not a de Polignac number, because 22122221120021 - 2² = 22122221120017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22122221119975 and 22122221120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122221120081) 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, 90378680 + ... + 90623121.

It is an arithmetic number, because the mean of its divisors is an integer number (1550823439536).

Almost surely, 2^{22122221120021} is an apocalyptic number.

It is an amenable number.

22122221120021 is a deficient number, since it is larger than the sum of its proper divisors (2690953912555).

22122221120021 is a wasteful number, since it uses less digits than its factorization.

22122221120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181002124.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22122221120021 its reverse (12002112222122), we get a palindrome (34124333342143).

The spelling of 22122221120021 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty thousand, twenty-one".