22121100021021 has 32 divisors (see below), whose sum is σ = 32122799808000. Its totient is φ = 13487333727168.

The previous prime is 22121100021017. The next prime is 22121100021071. The reversal of 22121100021021 is 12012000112122.

It is not a de Polignac number, because 22121100021021 - 2² = 22121100021017 is a prime.

It is a super-2 number, since 2×22121100021021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100021001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9495546 + ... + 11593428.

It is an arithmetic number, because the mean of its divisors is an integer number (1003837494000).

Almost surely, 2^{22121100021021} is an apocalyptic number.

It is an amenable number.

22121100021021 is a deficient number, since it is larger than the sum of its proper divisors (10001699786979).

22121100021021 is a wasteful number, since it uses less digits than its factorization.

22121100021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104313.

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

Adding to 22121100021021 its reverse (12012000112122), we get a palindrome (34133100133143).

The spelling of 22121100021021 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, twenty-one".