20221000022121 has 16 divisors (see below), whose sum is σ = 28381019016000. Its totient is φ = 12770857260288.

The previous prime is 20221000022089. The next prime is 20221000022149. The reversal of 20221000022121 is 12122000012202.

It is not a de Polignac number, because 20221000022121 - 2⁵ = 20221000022089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20221000022121.

It is not an unprimeable number, because it can be changed into a prime (20221000022191) 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 15 ways as a sum of consecutive naturals, for example, 1720596 + ... + 6588053.

It is an arithmetic number, because the mean of its divisors is an integer number (1773813688500).

Almost surely, 2^{20221000022121} is an apocalyptic number.

It is an amenable number.

20221000022121 is a deficient number, since it is larger than the sum of its proper divisors (8160018993879).

20221000022121 is a wasteful number, since it uses less digits than its factorization.

20221000022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8351368.

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

Adding to 20221000022121 its reverse (12122000012202), we get a palindrome (32343000034323).

The spelling of 20221000022121 in words is "twenty trillion, two hundred twenty-one billion, twenty-two thousand, one hundred twenty-one".