21021011300 has 18 divisors (see below), whose sum is σ = 45615594738. Its totient is φ = 8408404480.

The previous prime is 21021011281. The next prime is 21021011339. The reversal of 21021011300 is 311012012.

It can be written as a sum of positive squares in 3 ways, for example, as 1607047744 + 19413963556 = 40088^2 + 139334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105104957 + ... + 105105156.

Almost surely, 2^21021011300 is an apocalyptic number.

21021011300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021011300 is an abundant number, since it is smaller than the sum of its proper divisors (24594583438).

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

21021011300 is a wasteful number, since it uses less digits than its factorization.

21021011300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210210127 (or 210210120 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21021011300 its reverse (311012012), we get a palindrome (21332023312).

The spelling of 21021011300 in words is "twenty-one billion, twenty-one million, eleven thousand, three hundred".