21301201000 has 32 divisors (see below), whose sum is σ = 49844812680. Its totient is φ = 8520480000.

The previous prime is 21301200997. The next prime is 21301201001. The reversal of 21301201000 is 10210312.

It can be written as a sum of positive squares in 4 ways, for example, as 1041094756 + 20260106244 = 32266^2 + 142338^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21301201001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10649601 + ... + 10651600.

Almost surely, 2^21301201000 is an apocalyptic number.

21301201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301201000 is an abundant number, since it is smaller than the sum of its proper divisors (28543611680).

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

21301201000 is a wasteful number, since it uses less digits than its factorization.

21301201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21301222 (or 21301208 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21301201000 its reverse (10210312), we get a palindrome (21311411312).

The spelling of 21301201000 in words is "twenty-one billion, three hundred one million, two hundred one thousand".