21331201121994 has 8 divisors (see below), whose sum is σ = 42662402244000. Its totient is φ = 7110400373996.

The previous prime is 21331201121953. The next prime is 21331201122001. The reversal of 21331201121994 is 49912110213312.

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

21331201121994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777600093494 + ... + 1777600093505.

It is an arithmetic number, because the mean of its divisors is an integer number (5332800280500).

Almost surely, 2^{21331201121994} is an apocalyptic number.

21331201121994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21331201121994 is a wasteful number, since it uses less digits than its factorization.

21331201121994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555200187004.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 21331201121994 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred one million, one hundred twenty-one thousand, nine hundred ninety-four".