221122102245 has 128 divisors (see below), whose sum is σ = 414450473472. Its totient is φ = 99483648000.

The previous prime is 221122102241. The next prime is 221122102247. The reversal of 221122102245 is 542201221122.

It is a happy number.

It is not a de Polignac number, because 221122102245 - 2² = 221122102241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122102241) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 72807867 + ... + 72810903.

It is an arithmetic number, because the mean of its divisors is an integer number (3237894324).

Almost surely, 2^221122102245 is an apocalyptic number.

It is an amenable number.

221122102245 is a deficient number, since it is larger than the sum of its proper divisors (193328371227).

221122102245 is a wasteful number, since it uses less digits than its factorization.

221122102245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 221122102245 its reverse (542201221122), we get a palindrome (763323323367).

The spelling of 221122102245 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred two thousand, two hundred forty-five".