121521440452552 has 32 divisors (see below), whose sum is σ = 260404350264000. Its totient is φ = 52080364620864.

The previous prime is 121521440452507. The next prime is 121521440452567. The reversal of 121521440452552 is 255254044125121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121521440452499 and 121521440452508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6616074 + ... + 16935622.

It is an arithmetic number, because the mean of its divisors is an integer number (8137635945750).

Almost surely, 2^{121521440452552} is an apocalyptic number.

It is an amenable number.

121521440452552 is an abundant number, since it is smaller than the sum of its proper divisors (138882909811448).

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

121521440452552 is a wasteful number, since it uses less digits than its factorization.

121521440452552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10529845 (or 10529841 counting only the distinct ones).

The product of its (nonzero) digits is 640000, while the sum is 43.

Adding to 121521440452552 its reverse (255254044125121), we get a palindrome (376775484577673).

The spelling of 121521440452552 in words is "one hundred twenty-one trillion, five hundred twenty-one billion, four hundred forty million, four hundred fifty-two thousand, five hundred fifty-two".