21123301312197 has 24 divisors (see below), whose sum is σ = 34886952286784. Its totient is φ = 12064663070784.

The previous prime is 21123301312181. The next prime is 21123301312219. The reversal of 21123301312197 is 79121310332112.

21123301312197 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 330 + 1 + 312 + 1 + 9 + 7 = 666.

It is not a de Polignac number, because 21123301312197 - 2⁴ = 21123301312181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123301312097) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 80351368 + ... + 80613825.

Almost surely, 2^{21123301312197} is an apocalyptic number.

It is an amenable number.

21123301312197 is a deficient number, since it is larger than the sum of its proper divisors (13763650974587).

21123301312197 is a wasteful number, since it uses less digits than its factorization.

21123301312197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160967289 (or 160967286 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 21123301312197 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred one million, three hundred twelve thousand, one hundred ninety-seven".