121505416 has 16 divisors (see below), whose sum is σ = 229222800. Its totient is φ = 60379344.

The previous prime is 121505411. The next prime is 121505431. The reversal of 121505416 is 614505121.

It is a happy number.

It is a super-3 number, since 3×121505416³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (121505411) 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, 45286 + ... + 47893.

It is an arithmetic number, because the mean of its divisors is an integer number (14326425).

Almost surely, 2^121505416 is an apocalyptic number.

It is an amenable number.

121505416 is a deficient number, since it is larger than the sum of its proper divisors (107717384).

121505416 is a wasteful number, since it uses less digits than its factorization.

121505416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93348 (or 93344 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121505416 is about 11022.9495145356. The cubic root of 121505416 is about 495.2964465820.

The spelling of 121505416 in words is "one hundred twenty-one million, five hundred five thousand, four hundred sixteen".