221012220122 has 8 divisors (see below), whose sum is σ = 331772761056. Its totient is φ = 110421299772.

The previous prime is 221012220119. The next prime is 221012220179. The reversal of 221012220122 is 221022210122.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221012220122.

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, 42401888 + ... + 42407099.

It is an arithmetic number, because the mean of its divisors is an integer number (41471595132).

Almost surely, 2^221012220122 is an apocalyptic number.

221012220122 is a deficient number, since it is larger than the sum of its proper divisors (110760540934).

221012220122 is a wasteful number, since it uses less digits than its factorization.

221012220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84810292.

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

Adding to 221012220122 its reverse (221022210122), we get a palindrome (442034430244).

The spelling of 221012220122 in words is "two hundred twenty-one billion, twelve million, two hundred twenty thousand, one hundred twenty-two".