121361506 has 16 divisors (see below), whose sum is σ = 208986624. Its totient is φ = 51777504.

The previous prime is 121361489. The next prime is 121361509. The reversal of 121361506 is 605163121.

It is not an unprimeable number, because it can be changed into a prime (121361509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16315 + ... + 22558.

It is an arithmetic number, because the mean of its divisors is an integer number (13061664).

Almost surely, 2^121361506 is an apocalyptic number.

121361506 is a deficient number, since it is larger than the sum of its proper divisors (87625118).

121361506 is a wasteful number, since it uses less digits than its factorization.

121361506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39105.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121361506 is about 11016.4198358632. The cubic root of 121361506 is about 495.1008276736.

The spelling of 121361506 in words is "one hundred twenty-one million, three hundred sixty-one thousand, five hundred six".