21252134534299 has 8 divisors (see below), whose sum is σ = 21879878680800. Its totient is φ = 20629599883200.

The previous prime is 21252134534261. The next prime is 21252134534321. The reversal of 21252134534299 is 99243543125212.

It is a happy number.

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 21252134534299 - 2²⁷ = 21252000316571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21252134534999) 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, 1302365572 + ... + 1302381889.

It is an arithmetic number, because the mean of its divisors is an integer number (2734984835100).

Almost surely, 2^{21252134534299} is an apocalyptic number.

21252134534299 is a deficient number, since it is larger than the sum of its proper divisors (627744146501).

21252134534299 is a wasteful number, since it uses less digits than its factorization.

21252134534299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604747701.

The product of its digits is 4665600, while the sum is 52.

The spelling of 21252134534299 in words is "twenty-one trillion, two hundred fifty-two billion, one hundred thirty-four million, five hundred thirty-four thousand, two hundred ninety-nine".