121431113442 has 32 divisors (see below), whose sum is σ = 269888241600. Its totient is φ = 40470839424.

The previous prime is 121431113423. The next prime is 121431113471. The reversal of 121431113442 is 244311134121.

It is a happy number.

121431113442 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 311 + 1 + 344 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190738 + ... + 528434.

It is an arithmetic number, because the mean of its divisors is an integer number (8434007550).

Almost surely, 2^121431113442 is an apocalyptic number.

121431113442 is an abundant number, since it is smaller than the sum of its proper divisors (148457128158).

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

121431113442 is a wasteful number, since it uses less digits than its factorization.

121431113442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344367 (or 344361 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 121431113442 its reverse (244311134121), we get a palindrome (365742247563).

The spelling of 121431113442 in words is "one hundred twenty-one billion, four hundred thirty-one million, one hundred thirteen thousand, four hundred forty-two".