221002022021213 has 4 divisors (see below), whose sum is σ = 223664696985408. Its totient is φ = 218339347057020.

The previous prime is 221002022021161. The next prime is 221002022021239. The reversal of 221002022021213 is 312120220200122.

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 221002022021213 - 2²⁴ = 221002005243997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002022021273) 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, 1331337481973 + ... + 1331337482138.

It is an arithmetic number, because the mean of its divisors is an integer number (55916174246352).

Almost surely, 2^{221002022021213} is an apocalyptic number.

It is an amenable number.

221002022021213 is a deficient number, since it is larger than the sum of its proper divisors (2662674964195).

221002022021213 is an equidigital number, since it uses as much as digits as its factorization.

221002022021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662674964194.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221002022021213 its reverse (312120220200122), we get a palindrome (533122242221335).

The spelling of 221002022021213 in words is "two hundred twenty-one trillion, two billion, twenty-two million, twenty-one thousand, two hundred thirteen".