22121621666011 has 32 divisors (see below), whose sum is σ = 25758497415168. Its totient is φ = 18606455239680.

The previous prime is 22121621665937. The next prime is 22121621666017. The reversal of 22121621666011 is 11066612612122.

It is not a de Polignac number, because 22121621666011 - 2¹⁷ = 22121621534939 is a prime.

It is a super-2 number, since 2×22121621666011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121621666017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580402891 + ... + 580441003.

It is an arithmetic number, because the mean of its divisors is an integer number (804953044224).

Almost surely, 2^{22121621666011} is an apocalyptic number.

22121621666011 is a deficient number, since it is larger than the sum of its proper divisors (3636875749157).

22121621666011 is a wasteful number, since it uses less digits than its factorization.

22121621666011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43651.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 22121621666011 in words is "twenty-two trillion, one hundred twenty-one billion, six hundred twenty-one million, six hundred sixty-six thousand, eleven".