22001020121021 has 16 divisors (see below), whose sum is σ = 22979080447680. Its totient is φ = 21043155317760.

The previous prime is 22001020120993. The next prime is 22001020121023. The reversal of 22001020121021 is 12012102010022.

It is a cyclic number.

It is not a de Polignac number, because 22001020121021 - 2⁶ = 22001020120957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001020120987 and 22001020121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001020121023) 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, 194005466 + ... + 194118836.

It is an arithmetic number, because the mean of its divisors is an integer number (1436192527980).

Almost surely, 2^{22001020121021} is an apocalyptic number.

It is an amenable number.

22001020121021 is a deficient number, since it is larger than the sum of its proper divisors (978060326659).

22001020121021 is a wasteful number, since it uses less digits than its factorization.

22001020121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202364.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22001020121021 its reverse (12012102010022), we get a palindrome (34013122131043).

The spelling of 22001020121021 in words is "twenty-two trillion, one billion, twenty million, one hundred twenty-one thousand, twenty-one".