21113331365304 has 32 divisors (see below), whose sum is σ = 58648142682000. Its totient is φ = 7037777121696.

The previous prime is 21113331365303. The next prime is 21113331365327. The reversal of 21113331365304 is 40356313331112.

It is a happy number.

21113331365304 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 33 + 313 + 6 + 5 + 304 = 666.

It is a super-2 number, since 2×21113331365304² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113331365303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48873452019 + ... + 48873452450.

Almost surely, 2^{21113331365304} is an apocalyptic number.

21113331365304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21113331365304 is an abundant number, since it is smaller than the sum of its proper divisors (37534811316696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113331365304 is a wasteful number, since it uses less digits than its factorization.

21113331365304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97746904484 (or 97746904474 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

Adding to 21113331365304 its reverse (40356313331112), we get a palindrome (61469644696416).

The spelling of 21113331365304 in words is "twenty-one trillion, one hundred thirteen billion, three hundred thirty-one million, three hundred sixty-five thousand, three hundred four".