121283615 has 4 divisors (see below), whose sum is σ = 145540344. Its totient is φ = 97026888.

The previous prime is 121283581. The next prime is 121283621. The reversal of 121283615 is 516382121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121283615 - 2¹² = 121279519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12128357 + ... + 12128366.

It is an arithmetic number, because the mean of its divisors is an integer number (36385086).

Almost surely, 2^121283615 is an apocalyptic number.

121283615 is a deficient number, since it is larger than the sum of its proper divisors (24256729).

121283615 is an equidigital number, since it uses as much as digits as its factorization.

121283615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24256728.

The product of its digits is 2880, while the sum is 29.

The square root of 121283615 is about 11012.8840455169. The cubic root of 121283615 is about 494.9948848228.

The spelling of 121283615 in words is "one hundred twenty-one million, two hundred eighty-three thousand, six hundred fifteen".