121431313430 has 96 divisors (see below), whose sum is σ = 270140054400. Its totient is φ = 39111351552.

The previous prime is 121431313397. The next prime is 121431313439. The reversal of 121431313430 is 34313134121.

It is a self number, because there is not a number n which added to its sum of digits gives 121431313430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431313439) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 410291 + ... + 641249.

It is an arithmetic number, because the mean of its divisors is an integer number (2813958900).

Almost surely, 2^121431313430 is an apocalyptic number.

121431313430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121431313430 is an abundant number, since it is smaller than the sum of its proper divisors (148708740970).

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

121431313430 is a wasteful number, since it uses less digits than its factorization.

121431313430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231046 (or 231039 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 121431313430 its reverse (34313134121), we get a palindrome (155744447551).

The spelling of 121431313430 in words is "one hundred twenty-one billion, four hundred thirty-one million, three hundred thirteen thousand, four hundred thirty".