21124221299 has 8 divisors (see below), whose sum is σ = 22709130240. Its totient is φ = 19586623176.

The previous prime is 21124221271. The next prime is 21124221331. The reversal of 21124221299 is 99212242112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21124221299 - 2¹⁶ = 21124155763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21124421299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11826779 + ... + 11828564.

It is an arithmetic number, because the mean of its divisors is an integer number (2838641280).

Almost surely, 2^21124221299 is an apocalyptic number.

21124221299 is a deficient number, since it is larger than the sum of its proper divisors (1584908941).

21124221299 is a wasteful number, since it uses less digits than its factorization.

21124221299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23655409.

The product of its digits is 10368, while the sum is 35.

The spelling of 21124221299 in words is "twenty-one billion, one hundred twenty-four million, two hundred twenty-one thousand, two hundred ninety-nine".