221122121122 has 32 divisors (see below), whose sum is σ = 385887052800. Its totient is φ = 93070034640.

The previous prime is 221122121111. The next prime is 221122121137. The reversal of 221122121122 is 221121221122.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221122121122.

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, 45622 + ... + 666577.

It is an arithmetic number, because the mean of its divisors is an integer number (12058970400).

Almost surely, 2^221122121122 is an apocalyptic number.

221122121122 is a deficient number, since it is larger than the sum of its proper divisors (164764931678).

221122121122 is a wasteful number, since it uses less digits than its factorization.

221122121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712606.

The product of its digits is 128, while the sum is 19.

Adding to 221122121122 its reverse (221121221122), we get a palindrome (442243342244).

The spelling of 221122121122 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-two".