21003111300 has 72 divisors (see below), whose sum is σ = 61765268992. Its totient is φ = 5509008000.

The previous prime is 21003111281. The next prime is 21003111301. The reversal of 21003111300 is 311130012.

It is a super-2 number, since 2×21003111300² (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 not an unprimeable number, because it can be changed into a prime (21003111301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555556 + ... + 592155.

Almost surely, 2^21003111300 is an apocalyptic number.

21003111300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003111300 is an abundant number, since it is smaller than the sum of its proper divisors (40762157692).

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

21003111300 is a wasteful number, since it uses less digits than its factorization.

21003111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147789 (or 1147782 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21003111300 its reverse (311130012), we get a palindrome (21314241312).

The spelling of 21003111300 in words is "twenty-one billion, three million, one hundred eleven thousand, three hundred".