221423314291 has 4 divisors (see below), whose sum is σ = 221481085752. Its totient is φ = 221365542832.

The previous prime is 221423314279. The next prime is 221423314319. The reversal of 221423314291 is 192413324122.

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

It is a cyclic number.

It is not a de Polignac number, because 221423314291 - 2⁹ = 221423313779 is a prime.

It is a super-2 number, since 2×221423314291² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221423014291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28879981 + ... + 28887646.

It is an arithmetic number, because the mean of its divisors is an integer number (55370271438).

Almost surely, 2^221423314291 is an apocalyptic number.

221423314291 is a deficient number, since it is larger than the sum of its proper divisors (57771461).

221423314291 is an equidigital number, since it uses as much as digits as its factorization.

221423314291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57771460.

The product of its digits is 20736, while the sum is 34.

The spelling of 221423314291 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred fourteen thousand, two hundred ninety-one".