21111202113300 has 1296 divisors, whose sum is σ = 76931936040960. Its totient is φ = 4825827901440.

The previous prime is 21111202113271. The next prime is 21111202113307. The reversal of 21111202113300 is 331120211112.

21111202113300 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 120 + 211 + 330 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111202113307) by changing a digit.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 35600677804 + ... + 35600678396.

It is an arithmetic number, because the mean of its divisors is an integer number (59361061760).

Almost surely, 2^{21111202113300} is an apocalyptic number.

21111202113300 is a gapful number since it is divisible by the number (20) 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 21111202113300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38465968020480).

21111202113300 is an abundant number, since it is smaller than the sum of its proper divisors (55820733927660).

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

21111202113300 is a wasteful number, since it uses less digits than its factorization.

21111202113300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111202113300 its reverse (331120211112), we get a palindrome (21442322324412).

The spelling of 21111202113300 in words is "twenty-one trillion, one hundred eleven billion, two hundred two million, one hundred thirteen thousand, three hundred".