121200403552 has 48 divisors (see below), whose sum is σ = 255429115200. Its totient is φ = 56437637760.

The previous prime is 121200403537. The next prime is 121200403553. The reversal of 121200403552 is 255304002121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200403553) 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, 1653474 + ... + 1725217.

It is an arithmetic number, because the mean of its divisors is an integer number (5321439900).

Almost surely, 2^121200403552 is an apocalyptic number.

It is an amenable number.

121200403552 is an abundant number, since it is smaller than the sum of its proper divisors (134228711648).

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

121200403552 is a wasteful number, since it uses less digits than its factorization.

121200403552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378779 (or 3378771 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 121200403552 its reverse (255304002121), we get a palindrome (376504405673).

The spelling of 121200403552 in words is "one hundred twenty-one billion, two hundred million, four hundred three thousand, five hundred fifty-two".