221211322210 has 8 divisors (see below), whose sum is σ = 398180379996. Its totient is φ = 88484528880.

The previous prime is 221211322169. The next prime is 221211322217. The reversal of 221211322210 is 12223112122.

It can be written as a sum of positive squares in 2 ways, for example, as 220207763169 + 1003559041 = 469263^2 + 31679^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221211322217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11060566101 + ... + 11060566120.

Almost surely, 2^221211322210 is an apocalyptic number.

221211322210 is a deficient number, since it is larger than the sum of its proper divisors (176969057786).

221211322210 is a wasteful number, since it uses less digits than its factorization.

221211322210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22121132228.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221211322210 its reverse (12223112122), we get a palindrome (233434434332).

The spelling of 221211322210 in words is "two hundred twenty-one billion, two hundred eleven million, three hundred twenty-two thousand, two hundred ten".