221401313204 has 48 divisors (see below), whose sum is σ = 401129221248. Its totient is φ = 106864188288.

The previous prime is 221401313143. The next prime is 221401313321. The reversal of 221401313204 is 402313104122.

It is a self number, because there is not a number n which added to its sum of digits gives 221401313204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12590162 + ... + 12607734.

It is an arithmetic number, because the mean of its divisors is an integer number (8356858776).

Almost surely, 2^221401313204 is an apocalyptic number.

It is an amenable number.

221401313204 is a deficient number, since it is larger than the sum of its proper divisors (179727908044).

221401313204 is a wasteful number, since it uses less digits than its factorization.

221401313204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18584 (or 18582 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221401313204 its reverse (402313104122), we get a palindrome (623714417326).

The spelling of 221401313204 in words is "two hundred twenty-one billion, four hundred one million, three hundred thirteen thousand, two hundred four".