21301203210 has 64 divisors (see below), whose sum is σ = 60966438912. Its totient is φ = 4657156416.

The previous prime is 21301203193. The next prime is 21301203211. The reversal of 21301203210 is 1230210312.

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 21301203210.

It is not an unprimeable number, because it can be changed into a prime (21301203211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2200264 + ... + 2209923.

It is an arithmetic number, because the mean of its divisors is an integer number (952600608).

Almost surely, 2^21301203210 is an apocalyptic number.

21301203210 is an abundant number, since it is smaller than the sum of its proper divisors (39665235702).

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

21301203210 is a wasteful number, since it uses less digits than its factorization.

21301203210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410227.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21301203210 its reverse (1230210312), we get a palindrome (22531413522).

The spelling of 21301203210 in words is "twenty-one billion, three hundred one million, two hundred three thousand, two hundred ten".