121455430500 has 48 divisors (see below), whose sum is σ = 353678217984. Its totient is φ = 32388114400.

The previous prime is 121455430483. The next prime is 121455430507. The reversal of 121455430500 is 5034554121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (121455430507) by changing a digit.

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, 40483644 + ... + 40486643.

It is an arithmetic number, because the mean of its divisors is an integer number (7368296208).

Almost surely, 2^121455430500 is an apocalyptic number.

121455430500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121455430500 is an abundant number, since it is smaller than the sum of its proper divisors (232222787484).

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

121455430500 is a wasteful number, since it uses less digits than its factorization.

121455430500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80970309 (or 80970297 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 121455430500 its reverse (5034554121), we get a palindrome (126489984621).

The spelling of 121455430500 in words is "one hundred twenty-one billion, four hundred fifty-five million, four hundred thirty thousand, five hundred".