121440431010 has 128 divisors (see below), whose sum is σ = 305251752960. Its totient is φ = 30893780736.

The previous prime is 121440431003. The next prime is 121440431017. The reversal of 121440431010 is 10134044121.

It is an interprime number because it is at equal distance from previous prime (121440431003) and next prime (121440431017).

It is not an unprimeable number, because it can be changed into a prime (121440431017) 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 63 ways as a sum of consecutive naturals, for example, 11944189 + ... + 11954351.

It is an arithmetic number, because the mean of its divisors is an integer number (2384779320).

Almost surely, 2^121440431010 is an apocalyptic number.

121440431010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121440431010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152625876480).

121440431010 is an abundant number, since it is smaller than the sum of its proper divisors (183811321950).

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

121440431010 is a wasteful number, since it uses less digits than its factorization.

121440431010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10432.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121440431010 its reverse (10134044121), we get a palindrome (131574475131).

The spelling of 121440431010 in words is "one hundred twenty-one billion, four hundred forty million, four hundred thirty-one thousand, ten".