121430031440 has 20 divisors (see below), whose sum is σ = 282324823284. Its totient is φ = 48572012544.

The previous prime is 121430031413. The next prime is 121430031461. The reversal of 121430031440 is 44130034121.

121430031440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 25642257424 + 95787774016 = 160132^2 + 309496^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758937617 + ... + 758937776.

Almost surely, 2^121430031440 is an apocalyptic number.

121430031440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121430031440 is an abundant number, since it is smaller than the sum of its proper divisors (160894791844).

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

121430031440 is a wasteful number, since it uses less digits than its factorization.

121430031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517875406 (or 1517875400 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121430031440 its reverse (44130034121), we get a palindrome (165560065561).

The spelling of 121430031440 in words is "one hundred twenty-one billion, four hundred thirty million, thirty-one thousand, four hundred forty".