121816452 has 48 divisors (see below), whose sum is σ = 291479552. Its totient is φ = 39584160.

The previous prime is 121816447. The next prime is 121816459. The reversal of 121816452 is 254618121.

It is not an unprimeable number, because it can be changed into a prime (121816459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82077 + ... + 83547.

Almost surely, 2^121816452 is an apocalyptic number.

121816452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121816452 is an abundant number, since it is smaller than the sum of its proper divisors (169663100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121816452 is a wasteful number, since it uses less digits than its factorization.

121816452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1646 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 121816452 is about 11037.0490621361. The cubic root of 121816452 is about 495.7187151648.

The spelling of 121816452 in words is "one hundred twenty-one million, eight hundred sixteen thousand, four hundred fifty-two".