21121200111194 has 8 divisors (see below), whose sum is σ = 31693325020500. Its totient is φ = 10556758437696.

The previous prime is 21121200111161. The next prime is 21121200111239. The reversal of 21121200111194 is 49111100212112.

It can be written as a sum of positive squares in 2 ways, for example, as 17866556803225 + 3254643307969 = 4226885^2 + 1804063^2 .

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

It is a super-2 number, since 2×21121200111194² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1920802079 + ... + 1920813074.

Almost surely, 2^{21121200111194} is an apocalyptic number.

21121200111194 is a deficient number, since it is larger than the sum of its proper divisors (10572124909306).

21121200111194 is a wasteful number, since it uses less digits than its factorization.

21121200111194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841617904.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 21121200111194 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, one hundred eleven thousand, one hundred ninety-four".