121345255115 has 16 divisors (see below), whose sum is σ = 166473696960. Its totient is φ = 83179501440.

The previous prime is 121345255103. The next prime is 121345255121. The reversal of 121345255115 is 511552543121.

It is not a de Polignac number, because 121345255115 - 2⁶ = 121345255051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494096 + ... + 697725.

It is an arithmetic number, because the mean of its divisors is an integer number (10404606060).

Almost surely, 2^121345255115 is an apocalyptic number.

121345255115 is a deficient number, since it is larger than the sum of its proper divisors (45128441845).

121345255115 is a wasteful number, since it uses less digits than its factorization.

121345255115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194742.

The product of its digits is 30000, while the sum is 35.

Adding to 121345255115 its reverse (511552543121), we get a palindrome (632897798236).

The spelling of 121345255115 in words is "one hundred twenty-one billion, three hundred forty-five million, two hundred fifty-five thousand, one hundred fifteen".