21151223002399 has 8 divisors (see below), whose sum is σ = 24386745106080. Its totient is φ = 17969180603136.

The previous prime is 21151223002387. The next prime is 21151223002487. The reversal of 21151223002399 is 99320032215112.

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

It is not a de Polignac number, because 21151223002399 - 2¹⁷ = 21151222871327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151223002379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13369925254 + ... + 13369926835.

It is an arithmetic number, because the mean of its divisors is an integer number (3048343138260).

Almost surely, 2^{21151223002399} is an apocalyptic number.

21151223002399 is a deficient number, since it is larger than the sum of its proper divisors (3235522103681).

21151223002399 is a wasteful number, since it uses less digits than its factorization.

21151223002399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26739852209.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 21151223002399 in words is "twenty-one trillion, one hundred fifty-one billion, two hundred twenty-three million, two thousand, three hundred ninety-nine".