21211252314999 has 16 divisors (see below), whose sum is σ = 28972032361440. Its totient is φ = 13795667043840.

The previous prime is 21211252314961. The next prime is 21211252315031. The reversal of 21211252314999 is 99941325211212.

It is a happy number.

It is not a de Polignac number, because 21211252314999 - 2⁸ = 21211252314743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211252384999) 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, 4739229 + ... + 8054985.

It is an arithmetic number, because the mean of its divisors is an integer number (1810752022590).

Almost surely, 2^{21211252314999} is an apocalyptic number.

21211252314999 is a deficient number, since it is larger than the sum of its proper divisors (7760780046441).

21211252314999 is a wasteful number, since it uses less digits than its factorization.

21211252314999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367810.

The product of its digits is 699840, while the sum is 51.

The spelling of 21211252314999 in words is "twenty-one trillion, two hundred eleven billion, two hundred fifty-two million, three hundred fourteen thousand, nine hundred ninety-nine".