21301201500 has 96 divisors (see below), whose sum is σ = 63542187072. Its totient is φ = 5541760000.

The previous prime is 21301201379. The next prime is 21301201529. The reversal of 21301201500 is 510210312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21301201500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111681 + ... + 234680.

It is an arithmetic number, because the mean of its divisors is an integer number (661897782).

Almost surely, 2^21301201500 is an apocalyptic number.

21301201500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301201500 is an abundant number, since it is smaller than the sum of its proper divisors (42240985572).

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

21301201500 is a wasteful number, since it uses less digits than its factorization.

21301201500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346424 (or 346412 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21301201500 its reverse (510210312), we get a palindrome (21811411812).

The spelling of 21301201500 in words is "twenty-one billion, three hundred one million, two hundred one thousand, five hundred".