221163634402 has 8 divisors (see below), whose sum is σ = 332404986816. Its totient is φ = 110361972132.

The previous prime is 221163634399. The next prime is 221163634423. The reversal of 221163634402 is 204436361122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109921278 + ... + 109923289.

It is an arithmetic number, because the mean of its divisors is an integer number (41550623352).

Almost surely, 2^221163634402 is an apocalyptic number.

221163634402 is a deficient number, since it is larger than the sum of its proper divisors (111241352414).

221163634402 is a wasteful number, since it uses less digits than its factorization.

221163634402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219845072.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 221163634402 its reverse (204436361122), we get a palindrome (425599995524).

The spelling of 221163634402 in words is "two hundred twenty-one billion, one hundred sixty-three million, six hundred thirty-four thousand, four hundred two".