21124013199 has 16 divisors (see below), whose sum is σ = 28507944192. Its totient is φ = 13912414848.

The previous prime is 21124013161. The next prime is 21124013219. The reversal of 21124013199 is 99131042112.

It is not a de Polignac number, because 21124013199 - 2²⁰ = 21122964623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124013129) 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, 47674 + ... + 210999.

It is an arithmetic number, because the mean of its divisors is an integer number (1781746512).

Almost surely, 2^21124013199 is an apocalyptic number.

21124013199 is a deficient number, since it is larger than the sum of its proper divisors (7383930993).

21124013199 is a wasteful number, since it uses less digits than its factorization.

21124013199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259006.

The product of its (nonzero) digits is 3888, while the sum is 33.

The spelling of 21124013199 in words is "twenty-one billion, one hundred twenty-four million, thirteen thousand, one hundred ninety-nine".