121431222255 has 64 divisors (see below), whose sum is σ = 225791705088. Its totient is φ = 54579208320.

The previous prime is 121431222247. The next prime is 121431222281. The reversal of 121431222255 is 552222134121.

It is not a de Polignac number, because 121431222255 - 2³ = 121431222247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2713794 + ... + 2758176.

It is an arithmetic number, because the mean of its divisors is an integer number (3527995392).

Almost surely, 2^121431222255 is an apocalyptic number.

121431222255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121431222255 is a deficient number, since it is larger than the sum of its proper divisors (104360482833).

121431222255 is a wasteful number, since it uses less digits than its factorization.

121431222255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44836.

The product of its digits is 9600, while the sum is 30.

Adding to 121431222255 its reverse (552222134121), we get a palindrome (673653356376).

The spelling of 121431222255 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-two thousand, two hundred fifty-five".