22121000515404 has 72 divisors (see below), whose sum is σ = 64470644652960. Its totient is φ = 6264354120192.

The previous prime is 22121000515391. The next prime is 22121000515547. The reversal of 22121000515404 is 40451500012122.

It is a happy number.

22121000515404 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 100 + 0 + 515 + 40 + 4 = 666.

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, 388386339 + ... + 388443290.

It is an arithmetic number, because the mean of its divisors is an integer number (895425620180).

Almost surely, 2^{22121000515404} is an apocalyptic number.

It is an amenable number.

22121000515404 is an abundant number, since it is smaller than the sum of its proper divisors (42349644137556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121000515404 is a wasteful number, since it uses less digits than its factorization.

22121000515404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776829759 (or 776829754 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 22121000515404 its reverse (40451500012122), we get a palindrome (62572500527526).

The spelling of 22121000515404 in words is "twenty-two trillion, one hundred twenty-one billion, five hundred fifteen thousand, four hundred four".