21312014044121 has 8 divisors (see below), whose sum is σ = 21673372768800. Its totient is φ = 20950659924480.

The previous prime is 21312014044117. The next prime is 21312014044163. The reversal of 21312014044121 is 12144041021312.

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

It is a cyclic number.

It is not a de Polignac number, because 21312014044121 - 2² = 21312014044117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312014044721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8924441 + ... + 11057561.

It is an arithmetic number, because the mean of its divisors is an integer number (2709171596100).

Almost surely, 2^{21312014044121} is an apocalyptic number.

It is an amenable number.

21312014044121 is a deficient number, since it is larger than the sum of its proper divisors (361358724679).

21312014044121 is a wasteful number, since it uses less digits than its factorization.

21312014044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302519.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 21312014044121 its reverse (12144041021312), we get a palindrome (33456055065433).

The spelling of 21312014044121 in words is "twenty-one trillion, three hundred twelve billion, fourteen million, forty-four thousand, one hundred twenty-one".