121605512 has 16 divisors (see below), whose sum is σ = 260583360. Its totient is φ = 52116624.

The previous prime is 121605511. The next prime is 121605527. The reversal of 121605512 is 215506121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121605511) 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, 1085708 + ... + 1085819.

It is an arithmetic number, because the mean of its divisors is an integer number (16286460).

Almost surely, 2^121605512 is an apocalyptic number.

It is an amenable number.

121605512 is an abundant number, since it is smaller than the sum of its proper divisors (138977848).

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

121605512 is a wasteful number, since it uses less digits than its factorization.

121605512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171540 (or 2171536 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 121605512 is about 11027.4889254082. The cubic root of 121605512 is about 495.4324174359.

The spelling of 121605512 in words is "one hundred twenty-one million, six hundred five thousand, five hundred twelve".