121225424253155 has 32 divisors (see below), whose sum is σ = 145994187240000. Its totient is φ = 96631815168000.

The previous prime is 121225424253091. The next prime is 121225424253229. The reversal of 121225424253155 is 551352424522121.

It is not a de Polignac number, because 121225424253155 - 2⁶ = 121225424253091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8206980920 + ... + 8206995690.

It is an arithmetic number, because the mean of its divisors is an integer number (4562318351250).

Almost surely, 2^{121225424253155} is an apocalyptic number.

121225424253155 is a deficient number, since it is larger than the sum of its proper divisors (24768762986845).

121225424253155 is a wasteful number, since it uses less digits than its factorization.

121225424253155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19415.

The product of its digits is 960000, while the sum is 44.

Adding to 121225424253155 its reverse (551352424522121), we get a palindrome (672577848775276).

The spelling of 121225424253155 in words is "one hundred twenty-one trillion, two hundred twenty-five billion, four hundred twenty-four million, two hundred fifty-three thousand, one hundred fifty-five".