22211111220128 has 48 divisors (see below), whose sum is σ = 44337583019016. Its totient is φ = 10950844354560.

The previous prime is 22211111220121. The next prime is 22211111220161. The reversal of 22211111220128 is 82102211111222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17215761059344 + 4995350160784 = 4149188^2 + 2235028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22211111220097 and 22211111220106.

It is not an unprimeable number, because it can be changed into a prime (22211111220121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8817188 + ... + 11052828.

Almost surely, 2^{22211111220128} is an apocalyptic number.

It is an amenable number.

22211111220128 is a deficient number, since it is larger than the sum of its proper divisors (22126471798888).

22211111220128 is a wasteful number, since it uses less digits than its factorization.

22211111220128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239977 (or 2239969 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 26.

The spelling of 22211111220128 in words is "twenty-two trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-eight".