121051543 has 4 divisors (see below), whose sum is σ = 128172240. Its totient is φ = 113930848.

The previous prime is 121051529. The next prime is 121051547. The reversal of 121051543 is 345150121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121051543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121051547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560323 + ... + 3560356.

It is an arithmetic number, because the mean of its divisors is an integer number (32043060).

Almost surely, 2^121051543 is an apocalyptic number.

121051543 is a deficient number, since it is larger than the sum of its proper divisors (7120697).

121051543 is an equidigital number, since it uses as much as digits as its factorization.

121051543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120696.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 121051543 is about 11002.3426141890. The cubic root of 121051543 is about 494.6789647091.

The spelling of 121051543 in words is "one hundred twenty-one million, fifty-one thousand, five hundred forty-three".