231212103243 has 32 divisors (see below), whose sum is σ = 353083760640. Its totient is φ = 133213623840.

The previous prime is 231212103229. The next prime is 231212103259. The reversal of 231212103243 is 342301212132.

It is not a de Polignac number, because 231212103243 - 2¹⁸ = 231211841099 is a prime.

It is a super-2 number, since 2×231212103243² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231212101243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810723 + ... + 1058156.

It is an arithmetic number, because the mean of its divisors is an integer number (11033867520).

Almost surely, 2^231212103243 is an apocalyptic number.

231212103243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231212103243 is a deficient number, since it is larger than the sum of its proper divisors (121871657397).

231212103243 is a wasteful number, since it uses less digits than its factorization.

231212103243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869079.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 231212103243 its reverse (342301212132), we get a palindrome (573513315375).

The spelling of 231212103243 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred three thousand, two hundred forty-three".