21012021300 has 36 divisors (see below), whose sum is σ = 60794782496. Its totient is φ = 5603205600.

The previous prime is 21012021293. The next prime is 21012021313. The reversal of 21012021300 is 312021012.

It is a super-2 number, since 2×21012021300² (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 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, 35019736 + ... + 35020335.

Almost surely, 2^21012021300 is an apocalyptic number.

21012021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012021300 is an abundant number, since it is smaller than the sum of its proper divisors (39782761196).

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

21012021300 is a wasteful number, since it uses less digits than its factorization.

21012021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70040088 (or 70040081 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21012021300 its reverse (312021012), we get a palindrome (21324042312).

The spelling of 21012021300 in words is "twenty-one billion, twelve million, twenty-one thousand, three hundred".