12101543 has 4 divisors (see below), whose sum is σ = 12329928. Its totient is φ = 11873160.

The previous prime is 12101527. The next prime is 12101567. The reversal of 12101543 is 34510121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34510121 = 743 ⋅46447.

It is a cyclic number.

It is not a de Polignac number, because 12101543 - 2⁴ = 12101527 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 (12101443) 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, 114113 + ... + 114218.

It is an arithmetic number, because the mean of its divisors is an integer number (3082482).

Almost surely, 2^12101543 is an apocalyptic number.

12101543 is a deficient number, since it is larger than the sum of its proper divisors (228385).

12101543 is an equidigital number, since it uses as much as digits as its factorization.

12101543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228384.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12101543 is about 3478.7272097708. The cubic root of 12101543 is about 229.5868006572.

Adding to 12101543 its reverse (34510121), we get a palindrome (46611664).

The spelling of 12101543 in words is "twelve million, one hundred one thousand, five hundred forty-three".