121440344431 has 8 divisors (see below), whose sum is σ = 138864779264. Its totient is φ = 104034863160.

The previous prime is 121440344393. The next prime is 121440344483. The reversal of 121440344431 is 134443044121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121440344431 - 2²³ = 121431955823 is a prime.

It is a super-2 number, since 2×121440344431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121440344393 and 121440344402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121440345431) 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 7 ways as a sum of consecutive naturals, for example, 4724655 + ... + 4750288.

It is an arithmetic number, because the mean of its divisors is an integer number (17358097408).

Almost surely, 2^121440344431 is an apocalyptic number.

121440344431 is a deficient number, since it is larger than the sum of its proper divisors (17424434833).

121440344431 is an equidigital number, since it uses as much as digits as its factorization.

121440344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9476781.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 121440344431 its reverse (134443044121), we get a palindrome (255883388552).

The spelling of 121440344431 in words is "one hundred twenty-one billion, four hundred forty million, three hundred forty-four thousand, four hundred thirty-one".