22121550005215 has 24 divisors (see below), whose sum is σ = 27490894786800. Its totient is φ = 17088216284160.

The previous prime is 22121550005161. The next prime is 22121550005221. The reversal of 22121550005215 is 51250005512122.

It is not a de Polignac number, because 22121550005215 - 2¹⁷ = 22121549874143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2969349 + ... + 7284238.

It is an arithmetic number, because the mean of its divisors is an integer number (1145453949450).

Almost surely, 2^{22121550005215} is an apocalyptic number.

22121550005215 is a deficient number, since it is larger than the sum of its proper divisors (5369344781585).

22121550005215 is a wasteful number, since it uses less digits than its factorization.

22121550005215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254103 (or 10254072 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 22121550005215 its reverse (51250005512122), we get a palindrome (73371555517337).

The spelling of 22121550005215 in words is "twenty-two trillion, one hundred twenty-one billion, five hundred fifty million, five thousand, two hundred fifteen".