21101211300 has 72 divisors (see below), whose sum is σ = 65749222336. Its totient is φ = 5194143360.

The previous prime is 21101211283. The next prime is 21101211323. The reversal of 21101211300 is 311210112.

It is a super-2 number, since 2×21101211300² (a number of 21 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 2701384 + ... + 2709183.

Almost surely, 2^21101211300 is an apocalyptic number.

21101211300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101211300 is an abundant number, since it is smaller than the sum of its proper divisors (44648011036).

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

21101211300 is a wasteful number, since it uses less digits than its factorization.

21101211300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410597 (or 5410590 counting only the distinct ones).

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

Adding to 21101211300 its reverse (311210112), we get a palindrome (21412421412).

The spelling of 21101211300 in words is "twenty-one billion, one hundred one million, two hundred eleven thousand, three hundred".