22112121021 has 8 divisors (see below), whose sum is σ = 29571901344. Its totient is φ = 14696877360.

The previous prime is 22112121013. The next prime is 22112121023. The reversal of 22112121021 is 12012121122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22112121021 - 2³ = 22112121013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112121023) 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 7 ways as a sum of consecutive naturals, for example, 11133006 + ... + 11134991.

It is an arithmetic number, because the mean of its divisors is an integer number (3696487668).

Almost surely, 2^22112121021 is an apocalyptic number.

It is an amenable number.

22112121021 is a deficient number, since it is larger than the sum of its proper divisors (7459780323).

22112121021 is a wasteful number, since it uses less digits than its factorization.

22112121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22268331.

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

Adding to 22112121021 its reverse (12012121122), we get a palindrome (34124242143).

The spelling of 22112121021 in words is "twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".