121543454151 has 80 divisors (see below), whose sum is σ = 212566109184. Its totient is φ = 67762287936.

The previous prime is 121543454147. The next prime is 121543454173. The reversal of 121543454151 is 151454345121.

121543454151 is a `hidden beast` number, since 1 + 2 + 1 + 54 + 3 + 454 + 151 = 666.

It is not a de Polignac number, because 121543454151 - 2² = 121543454147 is a prime.

It is a super-2 number, since 2×121543454151² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543454051) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 27231346 + ... + 27235808.

Almost surely, 2^121543454151 is an apocalyptic number.

121543454151 is a deficient number, since it is larger than the sum of its proper divisors (91022655033).

121543454151 is a wasteful number, since it uses less digits than its factorization.

121543454151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642 (or 5633 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 121543454151 its reverse (151454345121), we get a palindrome (272997799272).

The spelling of 121543454151 in words is "one hundred twenty-one billion, five hundred forty-three million, four hundred fifty-four thousand, one hundred fifty-one".