21021202202 has 128 divisors (see below), whose sum is σ = 45446220288. Its totient is φ = 7017062400.

The previous prime is 21021202201. The next prime is 21021202243. The reversal of 21021202202 is 20220212012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21021202201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2480252 + ... + 2488712.

It is an arithmetic number, because the mean of its divisors is an integer number (355048596).

Almost surely, 2^21021202202 is an apocalyptic number.

21021202202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021202202 is an abundant number, since it is smaller than the sum of its proper divisors (24425018086).

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

21021202202 is a wasteful number, since it uses less digits than its factorization.

21021202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21021202202 its reverse (20220212012), we get a palindrome (41241414214).

The spelling of 21021202202 in words is "twenty-one billion, twenty-one million, two hundred two thousand, two hundred two".