22001021121021 has 32 divisors (see below), whose sum is σ = 29917626721920. Its totient is φ = 14376431407104.

The previous prime is 22001021121019. The next prime is 22001021121059. The reversal of 22001021121021 is 12012112010022.

It is not a de Polignac number, because 22001021121021 - 2¹ = 22001021121019 is a prime.

It is a super-2 number, since 2×22001021121021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001021122021) 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 31 ways as a sum of consecutive naturals, for example, 2064461325 + ... + 2064471981.

It is an arithmetic number, because the mean of its divisors is an integer number (934925835060).

Almost surely, 2^{22001021121021} is an apocalyptic number.

It is an amenable number.

22001021121021 is a deficient number, since it is larger than the sum of its proper divisors (7916605600899).

22001021121021 is a wasteful number, since it uses less digits than its factorization.

22001021121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22285.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22001021121021 its reverse (12012112010022), we get a palindrome (34013133131043).

The spelling of 22001021121021 in words is "twenty-two trillion, one billion, twenty-one million, one hundred twenty-one thousand, twenty-one".