121521112 has 16 divisors (see below), whose sum is σ = 239844600. Its totient is φ = 57562560.

The previous prime is 121521067. The next prime is 121521133. The reversal of 121521112 is 211125121.

It is a congruent number.

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, 399589 + ... + 399892.

Almost surely, 2^121521112 is an apocalyptic number.

It is an amenable number.

121521112 is a deficient number, since it is larger than the sum of its proper divisors (118323488).

121521112 is a wasteful number, since it uses less digits than its factorization.

121521112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799506 (or 799502 counting only the distinct ones).

The product of its digits is 40, while the sum is 16.

The square root of 121521112 is about 11023.6614606944. The cubic root of 121521112 is about 495.3177730341.

Adding to 121521112 its reverse (211125121), we get a palindrome (332646233).

The spelling of 121521112 in words is "one hundred twenty-one million, five hundred twenty-one thousand, one hundred twelve".