121200344440 has 64 divisors (see below), whose sum is σ = 311688322560. Its totient is φ = 41550364800.

The previous prime is 121200344413. The next prime is 121200344453. The reversal of 121200344440 is 44443002121.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5006365 + ... + 5030515.

It is an arithmetic number, because the mean of its divisors is an integer number (4870130040).

Almost surely, 2^121200344440 is an apocalyptic number.

121200344440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200344440 is an abundant number, since it is smaller than the sum of its proper divisors (190487978120).

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

121200344440 is a wasteful number, since it uses less digits than its factorization.

121200344440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42092 (or 42088 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 121200344440 its reverse (44443002121), we get a palindrome (165643346561).

The spelling of 121200344440 in words is "one hundred twenty-one billion, two hundred million, three hundred forty-four thousand, four hundred forty".