21300211031100 has 144 divisors (see below), whose sum is σ = 61704034022400. Its totient is φ = 5673109317120.

The previous prime is 21300211031083. The next prime is 21300211031107. The reversal of 21300211031100 is 113011200312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21300211031100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300211031107) 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, 858555496 + ... + 858580304.

Almost surely, 2^{21300211031100} is an apocalyptic number.

21300211031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300211031100 is an abundant number, since it is smaller than the sum of its proper divisors (40403822991300).

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

21300211031100 is a wasteful number, since it uses less digits than its factorization.

21300211031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28212 (or 28205 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21300211031100 its reverse (113011200312), we get a palindrome (21413222231412).

The spelling of 21300211031100 in words is "twenty-one trillion, three hundred billion, two hundred eleven million, thirty-one thousand, one hundred".