21301244202 has 32 divisors (see below), whose sum is σ = 48769628544. Its totient is φ = 6075936000.

The previous prime is 21301244189. The next prime is 21301244203. The reversal of 21301244202 is 20244210312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21301244203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396699 + ... + 447182.

It is an arithmetic number, because the mean of its divisors is an integer number (1524050892).

Almost surely, 2^21301244202 is an apocalyptic number.

21301244202 is an abundant number, since it is smaller than the sum of its proper divisors (27468384342).

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

21301244202 is a wasteful number, since it uses less digits than its factorization.

21301244202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844494.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21301244202 its reverse (20244210312), we get a palindrome (41545454514).

The spelling of 21301244202 in words is "twenty-one billion, three hundred one million, two hundred forty-four thousand, two hundred two".