221200122122 has 64 divisors (see below), whose sum is σ = 412081344000. Its totient is φ = 86963331840.

The previous prime is 221200122097. The next prime is 221200122131. The reversal of 221200122122 is 221221002122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221200122122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1311872 + ... + 1470852.

It is an arithmetic number, because the mean of its divisors is an integer number (6438771000).

Almost surely, 2^221200122122 is an apocalyptic number.

221200122122 is a deficient number, since it is larger than the sum of its proper divisors (190881221878).

221200122122 is a wasteful number, since it uses less digits than its factorization.

221200122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159191.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221200122122 its reverse (221221002122), we get a palindrome (442421124244).

The spelling of 221200122122 in words is "two hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred twenty-two".