21211010122202 has 8 divisors (see below), whose sum is σ = 31816941599316. Its totient is φ = 10605362922432.

The previous prime is 21211010122199. The next prime is 21211010122217. The reversal of 21211010122202 is 20222101011212.

It can be written as a sum of positive squares in 2 ways, for example, as 15951964108081 + 5259046014121 = 3993991^2 + 2293261^2 .

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, 70882703 + ... + 71181314.

Almost surely, 2^{21211010122202} is an apocalyptic number.

21211010122202 is a deficient number, since it is larger than the sum of its proper divisors (10605931477114).

21211010122202 is a wasteful number, since it uses less digits than its factorization.

21211010122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142138672.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211010122202 its reverse (20222101011212), we get a palindrome (41433111133414).

The spelling of 21211010122202 in words is "twenty-one trillion, two hundred eleven billion, ten million, one hundred twenty-two thousand, two hundred two".