121245512 has 16 divisors (see below), whose sum is σ = 237219840. Its totient is φ = 57986896.

The previous prime is 121245499. The next prime is 121245533. The reversal of 121245512 is 215542121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329288 + ... + 329655.

It is an arithmetic number, because the mean of its divisors is an integer number (14826240).

Almost surely, 2^121245512 is an apocalyptic number.

It is an amenable number.

121245512 is a deficient number, since it is larger than the sum of its proper divisors (115974328).

121245512 is a wasteful number, since it uses less digits than its factorization.

121245512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658972 (or 658968 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 121245512 is about 11011.1539813046. The cubic root of 121245512 is about 494.9430427952.

Adding to 121245512 its reverse (215542121), we get a palindrome (336787633).

The spelling of 121245512 in words is "one hundred twenty-one million, two hundred forty-five thousand, five hundred twelve".