201110121988 has 12 divisors (see below), whose sum is σ = 355897126620. Its totient is φ = 99425228672.

The previous prime is 201110121943. The next prime is 201110122039. The reversal of 201110121988 is 889121011102.

It can be written as a sum of positive squares in 2 ways, for example, as 134426356164 + 66683765824 = 366642^2 + 258232^2 .

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, 282457681 + ... + 282458392.

It is an arithmetic number, because the mean of its divisors is an integer number (29658093885).

Almost surely, 2^201110121988 is an apocalyptic number.

It is an amenable number.

201110121988 is a deficient number, since it is larger than the sum of its proper divisors (154787004632).

201110121988 is a wasteful number, since it uses less digits than its factorization.

201110121988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564916166 (or 564916164 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 201110121988 in words is "two hundred one billion, one hundred ten million, one hundred twenty-one thousand, nine hundred eighty-eight".