21214040324987 has 16 divisors (see below), whose sum is σ = 21547914651648. Its totient is φ = 20882042946240.

The previous prime is 21214040324941. The next prime is 21214040325053. The reversal of 21214040324987 is 78942304041212.

It is a cyclic number.

It is not a de Polignac number, because 21214040324987 - 2⁸ = 21214040324731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214040524987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324226958 + ... + 324292380.

It is an arithmetic number, because the mean of its divisors is an integer number (1346744665728).

Almost surely, 2^{21214040324987} is an apocalyptic number.

21214040324987 is a deficient number, since it is larger than the sum of its proper divisors (333874326661).

21214040324987 is a wasteful number, since it uses less digits than its factorization.

21214040324987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79690.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 21214040324987 in words is "twenty-one trillion, two hundred fourteen billion, forty million, three hundred twenty-four thousand, nine hundred eighty-seven".