221321113197 has 4 divisors (see below), whose sum is σ = 295094817600. Its totient is φ = 147547408796.

The previous prime is 221321113177. The next prime is 221321113213. The reversal of 221321113197 is 791311123122.

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 221321113197 - 2¹⁴ = 221321096813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321113177) 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, 36886852197 + ... + 36886852202.

It is an arithmetic number, because the mean of its divisors is an integer number (73773704400).

Almost surely, 2^221321113197 is an apocalyptic number.

It is an amenable number.

221321113197 is a deficient number, since it is larger than the sum of its proper divisors (73773704403).

221321113197 is an equidigital number, since it uses as much as digits as its factorization.

221321113197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73773704402.

The product of its digits is 4536, while the sum is 33.

The spelling of 221321113197 in words is "two hundred twenty-one billion, three hundred twenty-one million, one hundred thirteen thousand, one hundred ninety-seven".