21121200002194 has 16 divisors (see below), whose sum is σ = 31861535286240. Its totient is φ = 10500821231040.

The previous prime is 21121200002131. The next prime is 21121200002219. The reversal of 21121200002194 is 49120000212112.

It is a super-2 number, since 2×21121200002194² (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 7 ways as a sum of consecutive naturals, for example, 32929644 + ... + 33564919.

It is an arithmetic number, because the mean of its divisors is an integer number (1991345955390).

Almost surely, 2^{21121200002194} is an apocalyptic number.

21121200002194 is a deficient number, since it is larger than the sum of its proper divisors (10740335284046).

21121200002194 is a wasteful number, since it uses less digits than its factorization.

21121200002194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66495465.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21121200002194 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, two thousand, one hundred ninety-four".