121133543 has 4 divisors (see below), whose sum is σ = 121173360. Its totient is φ = 121093728.

The previous prime is 121133533. The next prime is 121133563. The reversal of 121133543 is 345331121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345331121 = 1669 ⋅206909.

It is a cyclic number.

It is not a de Polignac number, because 121133543 - 2¹² = 121129447 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 (121133533) 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, 14930 + ... + 21567.

It is an arithmetic number, because the mean of its divisors is an integer number (30293340).

Almost surely, 2^121133543 is an apocalyptic number.

121133543 is a deficient number, since it is larger than the sum of its proper divisors (39817).

121133543 is an equidigital number, since it uses as much as digits as its factorization.

121133543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39816.

The product of its digits is 1080, while the sum is 23.

The square root of 121133543 is about 11006.0684624438. The cubic root of 121133543 is about 494.7906375781.

Adding to 121133543 its reverse (345331121), we get a palindrome (466464664).

The spelling of 121133543 in words is "one hundred twenty-one million, one hundred thirty-three thousand, five hundred forty-three".