121715283 has 4 divisors (see below), whose sum is σ = 162287048. Its totient is φ = 81143520.

The previous prime is 121715281. The next prime is 121715299. The reversal of 121715283 is 382517121.

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

It is not a de Polignac number, because 121715283 - 2¹ = 121715281 is a prime.

It is a super-2 number, since 2×121715283² = 29629220231540178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121715283.

It is not an unprimeable number, because it can be changed into a prime (121715281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20285878 + ... + 20285883.

It is an arithmetic number, because the mean of its divisors is an integer number (40571762).

Almost surely, 2^121715283 is an apocalyptic number.

121715283 is a deficient number, since it is larger than the sum of its proper divisors (40571765).

121715283 is an equidigital number, since it uses as much as digits as its factorization.

121715283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40571764.

The product of its digits is 3360, while the sum is 30.

The square root of 121715283 is about 11032.4649557567. The cubic root of 121715283 is about 495.5814451002.

The spelling of 121715283 in words is "one hundred twenty-one million, seven hundred fifteen thousand, two hundred eighty-three".