21020122222202 has 8 divisors (see below), whose sum is σ = 31842363366612. Its totient is φ = 10406001100000.

The previous prime is 21020122222171. The next prime is 21020122222213. The reversal of 21020122222202 is 20222222102012.

It can be written as a sum of positive squares in 2 ways, for example, as 20830269432361 + 189852789841 = 4564019^2 + 435721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52030005299 + ... + 52030005702.

Almost surely, 2^{21020122222202} is an apocalyptic number.

21020122222202 is a deficient number, since it is larger than the sum of its proper divisors (10822241144410).

21020122222202 is a wasteful number, since it uses less digits than its factorization.

21020122222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104060011104.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21020122222202 its reverse (20222222102012), we get a palindrome (41242344324214).

The spelling of 21020122222202 in words is "twenty-one trillion, twenty billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred two".