121503430550 has 48 divisors (see below), whose sum is σ = 236662165152. Its totient is φ = 46322707200.

The previous prime is 121503430547. The next prime is 121503430567. The reversal of 121503430550 is 55034305121.

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 23 ways as a sum of consecutive naturals, for example, 135152 + ... + 511148.

It is an arithmetic number, because the mean of its divisors is an integer number (4930461774).

Almost surely, 2^121503430550 is an apocalyptic number.

121503430550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121503430550 is a deficient number, since it is larger than the sum of its proper divisors (115158734602).

121503430550 is a wasteful number, since it uses less digits than its factorization.

121503430550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376313 (or 376308 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 121503430550 its reverse (55034305121), we get a palindrome (176537735671).

The spelling of 121503430550 in words is "one hundred twenty-one billion, five hundred three million, four hundred thirty thousand, five hundred fifty".