21301111200 has 72 divisors (see below), whose sum is σ = 69335124768. Its totient is φ = 5680295680.

The previous prime is 21301111199. The next prime is 21301111213. The reversal of 21301111200 is 211110312.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 4435332 + ... + 4440131.

It is an arithmetic number, because the mean of its divisors is an integer number (962987844).

Almost surely, 2^21301111200 is an apocalyptic number.

21301111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301111200 is an abundant number, since it is smaller than the sum of its proper divisors (48034013568).

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

21301111200 is a wasteful number, since it uses less digits than its factorization.

21301111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875486 (or 8875473 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21301111200 its reverse (211110312), we get a palindrome (21512221512).

The spelling of 21301111200 in words is "twenty-one billion, three hundred one million, one hundred eleven thousand, two hundred".