21202101202210 has 8 divisors (see below), whose sum is σ = 38163782163996. Its totient is φ = 8480840480880.

The previous prime is 21202101202207. The next prime is 21202101202231. The reversal of 21202101202210 is 1220210120212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21189975008049 + 12126194161 = 4603257^2 + 110119^2 .

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, 1060105060101 + ... + 1060105060120.

Almost surely, 2^{21202101202210} is an apocalyptic number.

21202101202210 is a deficient number, since it is larger than the sum of its proper divisors (16961680961786).

21202101202210 is a wasteful number, since it uses less digits than its factorization.

21202101202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120210120228.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202101202210 its reverse (1220210120212), we get a palindrome (22422311322422).

The spelling of 21202101202210 in words is "twenty-one trillion, two hundred two billion, one hundred one million, two hundred two thousand, two hundred ten".