210022210011221 has 4 divisors (see below), whose sum is σ = 210022283502444. Its totient is φ = 210022136520000.

The previous prime is 210022210011197. The next prime is 210022210011247. The reversal of 210022210011221 is 122110012220012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82894014298225 + 127128195712996 = 9104615^2 + 11275114^2 .

It is a cyclic number.

It is not a de Polignac number, because 210022210011221 - 2²⁶ = 210022142902357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210022210011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210022210011421) 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, 32277860 + ... + 38234861.

It is an arithmetic number, because the mean of its divisors is an integer number (52505570875611).

Almost surely, 2^{210022210011221} is an apocalyptic number.

It is an amenable number.

210022210011221 is a deficient number, since it is larger than the sum of its proper divisors (73491223).

210022210011221 is an equidigital number, since it uses as much as digits as its factorization.

210022210011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73491222.

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

Adding to 210022210011221 its reverse (122110012220012), we get a palindrome (332132222231233).

The spelling of 210022210011221 in words is "two hundred ten trillion, twenty-two billion, two hundred ten million, eleven thousand, two hundred twenty-one".