121543000455 has 32 divisors (see below), whose sum is σ = 194768068608. Its totient is φ = 64723276800.

The previous prime is 121543000433. The next prime is 121543000459. The reversal of 121543000455 is 554000345121.

It is not a de Polignac number, because 121543000455 - 2²⁶ = 121475891591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543000459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45915942 + ... + 45918588.

It is an arithmetic number, because the mean of its divisors is an integer number (6086502144).

Almost surely, 2^121543000455 is an apocalyptic number.

121543000455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121543000455 is a deficient number, since it is larger than the sum of its proper divisors (73225068153).

121543000455 is a wasteful number, since it uses less digits than its factorization.

121543000455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207.

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

Adding to 121543000455 its reverse (554000345121), we get a palindrome (675543345576).

The spelling of 121543000455 in words is "one hundred twenty-one billion, five hundred forty-three million, four hundred fifty-five", and thus it is an aban number.