121399112 has 16 divisors (see below), whose sum is σ = 227841900. Its totient is φ = 60641280.

The previous prime is 121399111. The next prime is 121399153. The reversal of 121399112 is 211993121.

It can be written as a sum of positive squares in 2 ways, for example, as 98684356 + 22714756 = 9934^2 + 4766^2 .

It is not an unprimeable number, because it can be changed into a prime (121399111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312 + ... + 15752.

Almost surely, 2^121399112 is an apocalyptic number.

It is an amenable number.

121399112 is a deficient number, since it is larger than the sum of its proper divisors (106442788).

121399112 is a wasteful number, since it uses less digits than its factorization.

121399112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14576 (or 14572 counting only the distinct ones).

The product of its digits is 972, while the sum is 29.

The square root of 121399112 is about 11018.1265195132. The cubic root of 121399112 is about 495.1519609627.

The spelling of 121399112 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, one hundred twelve".