21020210202202 has 16 divisors (see below), whose sum is σ = 31741492779360. Its totient is φ = 10439756269488.

The previous prime is 21020210202181. The next prime is 21020210202239. The reversal of 21020210202202 is 20220201202012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9950452 + ... + 11876527.

It is an arithmetic number, because the mean of its divisors is an integer number (1983843298710).

Almost surely, 2^{21020210202202} is an apocalyptic number.

21020210202202 is a deficient number, since it is larger than the sum of its proper divisors (10721282577158).

21020210202202 is a wasteful number, since it uses less digits than its factorization.

21020210202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830205.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21020210202202 its reverse (20220201202012), we get a palindrome (41240411404214).

The spelling of 21020210202202 in words is "twenty-one trillion, twenty billion, two hundred ten million, two hundred two thousand, two hundred two".