11212543123 has 8 divisors (see below), whose sum is σ = 11368053648. Its totient is φ = 11057518944.

The previous prime is 11212543081. The next prime is 11212543129. The reversal of 11212543123 is 32134521211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212543123 is a prime.

It is a super-2 number, since 2×11212543123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212543129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75036 + ... + 167497.

It is an arithmetic number, because the mean of its divisors is an integer number (1421006706).

Almost surely, 2^11212543123 is an apocalyptic number.

11212543123 is a deficient number, since it is larger than the sum of its proper divisors (155510525).

11212543123 is an equidigital number, since it uses as much as digits as its factorization.

11212543123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243173.

The product of its digits is 1440, while the sum is 25.

The spelling of 11212543123 in words is "eleven billion, two hundred twelve million, five hundred forty-three thousand, one hundred twenty-three".