221221100022112 has 12 divisors (see below), whose sum is σ = 435529040668596. Its totient is φ = 110610550011040.

The previous prime is 221221100022077. The next prime is 221221100022137. The reversal of 221221100022112 is 211220001122122.

It is a self number, because there is not a number n which added to its sum of digits gives 221221100022112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3456579687814 + ... + 3456579687877.

It is an arithmetic number, because the mean of its divisors is an integer number (36294086722383).

Almost surely, 2^{221221100022112} is an apocalyptic number.

It is an amenable number.

221221100022112 is a deficient number, since it is larger than the sum of its proper divisors (214307940646484).

221221100022112 is an equidigital number, since it uses as much as digits as its factorization.

221221100022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913159375701 (or 6913159375693 counting only the distinct ones).

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

Adding to 221221100022112 its reverse (211220001122122), we get a palindrome (432441101144234).

The spelling of 221221100022112 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred million, twenty-two thousand, one hundred twelve".