221122202012 has 12 divisors (see below), whose sum is σ = 387974205696. Its totient is φ = 110272428960.

The previous prime is 221122201987. The next prime is 221122202039. The reversal of 221122202012 is 210202221122.

It is a happy number.

It is a congruent number.

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, 72166289 + ... + 72169352.

It is an arithmetic number, because the mean of its divisors is an integer number (32331183808).

Almost surely, 2^221122202012 is an apocalyptic number.

It is an amenable number.

221122202012 is a deficient number, since it is larger than the sum of its proper divisors (166852003684).

221122202012 is a wasteful number, since it uses less digits than its factorization.

221122202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144336028 (or 144336026 counting only the distinct ones).

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

Adding to 221122202012 its reverse (210202221122), we get a palindrome (431324423134).

The spelling of 221122202012 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred two thousand, twelve".