21367799378099 has 8 divisors (see below), whose sum is σ = 21392183824800. Its totient is φ = 21343415596416.

The previous prime is 21367799377997. The next prime is 21367799378141. The reversal of 21367799378099 is 99087399776312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21367799378099 is a prime.

It is a super-2 number, since 2×21367799378099² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21367799378599) 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, 95216477 + ... + 95440625.

It is an arithmetic number, because the mean of its divisors is an integer number (2674022978100).

Almost surely, 2^{21367799378099} is an apocalyptic number.

21367799378099 is a deficient number, since it is larger than the sum of its proper divisors (24384446701).

21367799378099 is a wasteful number, since it uses less digits than its factorization.

21367799378099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332509.

The product of its (nonzero) digits is 1944365472, while the sum is 80.

The spelling of 21367799378099 in words is "twenty-one trillion, three hundred sixty-seven billion, seven hundred ninety-nine million, three hundred seventy-eight thousand, ninety-nine".