21102140321300 has 36 divisors (see below), whose sum is σ = 46908513884316. Its totient is φ = 8234981587200.

The previous prime is 21102140321299. The next prime is 21102140321309. The reversal of 21102140321300 is 312304120112.

It can be written as a sum of positive squares in 6 ways, for example, as 11047673030416 + 10054467290884 = 3323804^2 + 3170878^2 .

It is a super-2 number, since 2×21102140321300² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102140321309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2573427647 + ... + 2573435846.

Almost surely, 2^{21102140321300} is an apocalyptic number.

21102140321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102140321300 is an abundant number, since it is smaller than the sum of its proper divisors (25806373563016).

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

21102140321300 is a wasteful number, since it uses less digits than its factorization.

21102140321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146863548 (or 5146863541 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21102140321300 its reverse (312304120112), we get a palindrome (21414444441412).

The spelling of 21102140321300 in words is "twenty-one trillion, one hundred two billion, one hundred forty million, three hundred twenty-one thousand, three hundred".