121303412240 has 40 divisors (see below), whose sum is σ = 282720070680. Its totient is φ = 48402717696.

The previous prime is 121303412239. The next prime is 121303412309. The reversal of 121303412240 is 42214303121.

It can be written as a sum of positive squares in 4 ways, for example, as 19519442944 + 101783969296 = 139712^2 + 319036^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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, 1820939 + ... + 1886378.

It is an arithmetic number, because the mean of its divisors is an integer number (7068001767).

Almost surely, 2^121303412240 is an apocalyptic number.

121303412240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121303412240 is an abundant number, since it is smaller than the sum of its proper divisors (161416658440).

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

121303412240 is a wasteful number, since it uses less digits than its factorization.

121303412240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707739 (or 3707733 counting only the distinct ones).

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

Adding to 121303412240 its reverse (42214303121), we get a palindrome (163517715361).

The spelling of 121303412240 in words is "one hundred twenty-one billion, three hundred three million, four hundred twelve thousand, two hundred forty".