221423221434 has 16 divisors (see below), whose sum is σ = 442856851488. Its totient is φ = 73806005712.

The previous prime is 221423221427. The next prime is 221423221441. The reversal of 221423221434 is 434122324122.

It is an interprime number because it is at equal distance from previous prime (221423221427) and next prime (221423221441).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142057 + ... + 680460.

It is an arithmetic number, because the mean of its divisors is an integer number (27678553218).

Almost surely, 2^221423221434 is an apocalyptic number.

221423221434 is an abundant number, since it is smaller than the sum of its proper divisors (221433630054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221423221434 is a wasteful number, since it uses less digits than its factorization.

221423221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867389.

The product of its digits is 18432, while the sum is 30.

Adding to 221423221434 its reverse (434122324122), we get a palindrome (655545545556).

The spelling of 221423221434 in words is "two hundred twenty-one billion, four hundred twenty-three million, two hundred twenty-one thousand, four hundred thirty-four".