121343044540 has 24 divisors (see below), whose sum is σ = 254867149152. Its totient is φ = 48528312000.

The previous prime is 121343044531. The next prime is 121343044549. The reversal of 121343044540 is 45440343121.

It is an interprime number because it is at equal distance from previous prime (121343044531) and next prime (121343044549).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121343044549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444336 + ... + 663415.

It is an arithmetic number, because the mean of its divisors is an integer number (10619464548).

Almost surely, 2^121343044540 is an apocalyptic number.

121343044540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121343044540 is an abundant number, since it is smaller than the sum of its proper divisors (133524104612).

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

121343044540 is a wasteful number, since it uses less digits than its factorization.

121343044540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113237 (or 1113235 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 121343044540 its reverse (45440343121), we get a palindrome (166783387661).

The spelling of 121343044540 in words is "one hundred twenty-one billion, three hundred forty-three million, forty-four thousand, five hundred forty".