21125314299 has 16 divisors (see below), whose sum is σ = 29908485792. Its totient is φ = 13217538048.

The previous prime is 21125314289. The next prime is 21125314313. The reversal of 21125314299 is 99241352112.

It is not a de Polignac number, because 21125314299 - 2⁴ = 21125314283 is a prime.

It is a super-2 number, since 2×21125314299² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21125314289) 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, 568714 + ... + 604719.

It is an arithmetic number, because the mean of its divisors is an integer number (1869280362).

Almost surely, 2^21125314299 is an apocalyptic number.

21125314299 is a deficient number, since it is larger than the sum of its proper divisors (8783171493).

21125314299 is a wasteful number, since it uses less digits than its factorization.

21125314299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173806.

The product of its digits is 38880, while the sum is 39.

The spelling of 21125314299 in words is "twenty-one billion, one hundred twenty-five million, three hundred fourteen thousand, two hundred ninety-nine".