121322015 has 4 divisors (see below), whose sum is σ = 145586424. Its totient is φ = 97057608.

The previous prime is 121321999. The next prime is 121322021. The reversal of 121322015 is 510223121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510223121 = 19961 ⋅25561.

It is a cyclic number.

It is not a de Polignac number, because 121322015 - 2⁴ = 121321999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121321984 and 121322002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12132197 + ... + 12132206.

It is an arithmetic number, because the mean of its divisors is an integer number (36396606).

Almost surely, 2^121322015 is an apocalyptic number.

121322015 is a deficient number, since it is larger than the sum of its proper divisors (24264409).

121322015 is an equidigital number, since it uses as much as digits as its factorization.

121322015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24264408.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121322015 is about 11014.6273200685. The cubic root of 121322015 is about 495.0471199575.

Adding to 121322015 its reverse (510223121), we get a palindrome (631545136).

The spelling of 121322015 in words is "one hundred twenty-one million, three hundred twenty-two thousand, fifteen".