21216363361104 has 80 divisors (see below), whose sum is σ = 57696658516800. Its totient is φ = 6699551321088.

The previous prime is 21216363361093. The next prime is 21216363361117. The reversal of 21216363361104 is 40116336361212.

It is a super-3 number, since 3×21216363361104³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16988542 + ... + 18194594.

It is an arithmetic number, because the mean of its divisors is an integer number (721208231460).

Almost surely, 2^{21216363361104} is an apocalyptic number.

21216363361104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21216363361104 is an abundant number, since it is smaller than the sum of its proper divisors (36480295155696).

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

21216363361104 is a wasteful number, since it uses less digits than its factorization.

21216363361104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225372 (or 1225366 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 21216363361104 in words is "twenty-one trillion, two hundred sixteen billion, three hundred sixty-three million, three hundred sixty-one thousand, one hundred four".