21012413300 has 18 divisors (see below), whose sum is σ = 45596937078. Its totient is φ = 8404965280.

The previous prime is 21012413297. The next prime is 21012413351. The reversal of 21012413300 is 331421012.

It can be written as a sum of positive squares in 3 ways, for example, as 3532400356 + 17480012944 = 59434^2 + 132212^2 .

It is a congruent number.

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, 105061967 + ... + 105062166.

It is an arithmetic number, because the mean of its divisors is an integer number (2533163171).

Almost surely, 2^21012413300 is an apocalyptic number.

21012413300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012413300 is an abundant number, since it is smaller than the sum of its proper divisors (24584523778).

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

21012413300 is a wasteful number, since it uses less digits than its factorization.

21012413300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210124147 (or 210124140 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012413300 its reverse (331421012), we get a palindrome (21343834312).

The spelling of 21012413300 in words is "twenty-one billion, twelve million, four hundred thirteen thousand, three hundred".