120891112 has 8 divisors (see below), whose sum is σ = 226670850. Its totient is φ = 60445552.

The previous prime is 120891109. The next prime is 120891119. The reversal of 120891112 is 211198021.

It can be written as a sum of positive squares in only one way, i.e., 120692196 + 198916 = 10986^2 + 446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×120891112² = 29229321921193088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120891119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7555687 + ... + 7555702.

Almost surely, 2^120891112 is an apocalyptic number.

It is an amenable number.

120891112 is a deficient number, since it is larger than the sum of its proper divisors (105779738).

120891112 is a wasteful number, since it uses less digits than its factorization.

120891112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111395 (or 15111391 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 120891112 is about 10995.0494314487. The cubic root of 120891112 is about 494.4603335250.

The spelling of 120891112 in words is "one hundred twenty million, eight hundred ninety-one thousand, one hundred twelve".