22002120021021 has 16 divisors (see below), whose sum is σ = 33527133644928. Its totient is φ = 12572604907200.

The previous prime is 22002120021001. The next prime is 22002120021023. The reversal of 22002120021021 is 12012002120022.

It is not a de Polignac number, because 22002120021021 - 2⁵ = 22002120020989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002120021023) 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, 7520451 + ... + 10028031.

It is an arithmetic number, because the mean of its divisors is an integer number (2095445852808).

Almost surely, 2^{22002120021021} is an apocalyptic number.

22002120021021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22002120021021 is a deficient number, since it is larger than the sum of its proper divisors (11525013623907).

22002120021021 is a wasteful number, since it uses less digits than its factorization.

22002120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925412.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22002120021021 its reverse (12012002120022), we get a palindrome (34014122141043).

The spelling of 22002120021021 in words is "twenty-two trillion, two billion, one hundred twenty million, twenty-one thousand, twenty-one".