121431222108 has 72 divisors (see below), whose sum is σ = 350845823328. Its totient is φ = 34690232448.

The previous prime is 121431222097. The next prime is 121431222161. The reversal of 121431222108 is 801222134121.

It is a happy number.

121431222108 is a `hidden beast` number, since 1 + 2 + 1 + 431 + 2 + 221 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2315910 + ... + 2367762.

Almost surely, 2^121431222108 is an apocalyptic number.

121431222108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121431222108 is an abundant number, since it is smaller than the sum of its proper divisors (229414601220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121431222108 is a wasteful number, since it uses less digits than its factorization.

121431222108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61163 (or 61158 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 121431222108 its reverse (801222134121), we get a palindrome (922653356229).

The spelling of 121431222108 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-two thousand, one hundred eight".