22121222121021 has 8 divisors (see below), whose sum is σ = 29647786470400. Its totient is φ = 14671069592832.

The previous prime is 22121222121001. The next prime is 22121222121079. The reversal of 22121222121021 is 12012122212122.

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

It is not a de Polignac number, because 22121222121021 - 2¹⁷ = 22121221989949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121222121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19102954621 + ... + 19102955778.

It is an arithmetic number, because the mean of its divisors is an integer number (3705973308800).

Almost surely, 2^{22121222121021} is an apocalyptic number.

It is an amenable number.

22121222121021 is a deficient number, since it is larger than the sum of its proper divisors (7526564349379).

22121222121021 is a wasteful number, since it uses less digits than its factorization.

22121222121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38205910595.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22121222121021 its reverse (12012122212122), we get a palindrome (34133344333143).

The spelling of 22121222121021 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".