1213110243 has 8 divisors (see below), whose sum is σ = 1797200400. Its totient is φ = 808740144.

The previous prime is 1213110221. The next prime is 1213110247. The reversal of 1213110243 is 3420113121.

1213110243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1213110243 - 2⁶ = 1213110179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213110247) 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, 22464978 + ... + 22465031.

It is an arithmetic number, because the mean of its divisors is an integer number (224650050).

Almost surely, 2^1213110243 is an apocalyptic number.

1213110243 is a deficient number, since it is larger than the sum of its proper divisors (584090157).

1213110243 is an equidigital number, since it uses as much as digits as its factorization.

1213110243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44930018 (or 44930012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213110243 is about 34829.7321695129. The cubic root of 1213110243 is about 1066.5144809031.

Adding to 1213110243 its reverse (3420113121), we get a palindrome (4633223364).

The spelling of 1213110243 in words is "one billion, two hundred thirteen million, one hundred ten thousand, two hundred forty-three".