21298111540992 has 432 divisors, whose sum is σ = 72739681044576. Its totient is φ = 5957502566400.

The previous prime is 21298111540987. The next prime is 21298111540997. The reversal of 21298111540992 is 29904511189212.

21298111540992 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 8 + 1 + 1 + 1 + 540 + 9 + 92 = 666.

It is an interprime number because it is at equal distance from previous prime (21298111540987) and next prime (21298111540997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21298111540997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39598992 + ... + 40133232.

Almost surely, 2^{21298111540992} is an apocalyptic number.

21298111540992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21298111540992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36369840522288).

21298111540992 is an abundant number, since it is smaller than the sum of its proper divisors (51441569503584).

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

21298111540992 is a wasteful number, since it uses less digits than its factorization.

21298111540992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534309 (or 534270 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 21298111540992 in words is "twenty-one trillion, two hundred ninety-eight billion, one hundred eleven million, five hundred forty thousand, nine hundred ninety-two".