221001222110213 has 4 divisors (see below), whose sum is σ = 221001819614688. Its totient is φ = 221000624605740.

The previous prime is 221001222110173. The next prime is 221001222110237. The reversal of 221001222110213 is 312011222100122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221001222110213 - 2²⁰ = 221001221061637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001222112213) 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, 298197083 + ... + 298937288.

It is an arithmetic number, because the mean of its divisors is an integer number (55250454903672).

Almost surely, 2^{221001222110213} is an apocalyptic number.

It is an amenable number.

221001222110213 is a deficient number, since it is larger than the sum of its proper divisors (597504475).

221001222110213 is an equidigital number, since it uses as much as digits as its factorization.

221001222110213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597504474.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221001222110213 its reverse (312011222100122), we get a palindrome (533012444210335).

The spelling of 221001222110213 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-two million, one hundred ten thousand, two hundred thirteen".