1213424243 has 2 divisors, whose sum is σ = 1213424244. Its totient is φ = 1213424242.

The previous prime is 1213424231. The next prime is 1213424257. The reversal of 1213424243 is 3424243121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213424243 - 2¹⁰ = 1213423219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213424743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606712121 + 606712122.

It is an arithmetic number, because the mean of its divisors is an integer number (606712122).

Almost surely, 2^1213424243 is an apocalyptic number.

1213424243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213424243 is an equidigital number, since it uses as much as digits as its factorization.

1213424243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 26.

The square root of 1213424243 is about 34834.2395209082. The cubic root of 1213424243 is about 1066.6064914078.

Adding to 1213424243 its reverse (3424243121), we get a palindrome (4637667364).

The spelling of 1213424243 in words is "one billion, two hundred thirteen million, four hundred twenty-four thousand, two hundred forty-three".