201111120228 has 48 divisors (see below), whose sum is σ = 480908425536. Its totient is φ = 65377656960.

The previous prime is 201111120211. The next prime is 201111120229. The reversal of 201111120228 is 822021111102.

It is a super-2 number, since 2×201111120228² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201111120229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38518 + ... + 635378.

It is an arithmetic number, because the mean of its divisors is an integer number (10018925532).

Almost surely, 2^201111120228 is an apocalyptic number.

It is an amenable number.

201111120228 is an abundant number, since it is smaller than the sum of its proper divisors (279797305308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111120228 is a wasteful number, since it uses less digits than its factorization.

201111120228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597564 (or 597562 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The spelling of 201111120228 in words is "two hundred one billion, one hundred eleven million, one hundred twenty thousand, two hundred twenty-eight".