1212411243 has 4 divisors (see below), whose sum is σ = 1616548328. Its totient is φ = 808274160.

The previous prime is 1212411217. The next prime is 1212411247. The reversal of 1212411243 is 3421142121.

1212411243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1212411243 - 2¹⁷ = 1212280171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212411247) 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, 202068538 + ... + 202068543.

It is an arithmetic number, because the mean of its divisors is an integer number (404137082).

Almost surely, 2^1212411243 is an apocalyptic number.

1212411243 is a deficient number, since it is larger than the sum of its proper divisors (404137085).

1212411243 is an equidigital number, since it uses as much as digits as its factorization.

1212411243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404137084.

The product of its digits is 384, while the sum is 21.

The square root of 1212411243 is about 34819.6961933903. The cubic root of 1212411243 is about 1066.3095979427.

Adding to 1212411243 its reverse (3421142121), we get a palindrome (4633553364).

The spelling of 1212411243 in words is "one billion, two hundred twelve million, four hundred eleven thousand, two hundred forty-three".