21112243321300 has 36 divisors (see below), whose sum is σ = 46233875994460. Its totient is φ = 8367421201920.

The previous prime is 21112243321271. The next prime is 21112243321319. The reversal of 21112243321300 is 312334221112.

It can be written as a sum of positive squares in 6 ways, for example, as 87854145604 + 21024389175696 = 296402^2 + 4585236^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 968440629 + ... + 968462428.

Almost surely, 2^{21112243321300} is an apocalyptic number.

21112243321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112243321300 is an abundant number, since it is smaller than the sum of its proper divisors (25121632673160).

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

21112243321300 is a wasteful number, since it uses less digits than its factorization.

21112243321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936903180 (or 1936903173 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21112243321300 its reverse (312334221112), we get a palindrome (21424577542412).

The spelling of 21112243321300 in words is "twenty-one trillion, one hundred twelve billion, two hundred forty-three million, three hundred twenty-one thousand, three hundred".