1213430123 has 2 divisors, whose sum is σ = 1213430124. Its totient is φ = 1213430122.

The previous prime is 1213430077. The next prime is 1213430147. The reversal of 1213430123 is 3210343121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213430123 - 2¹⁶ = 1213364587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213430095 and 1213430104.

It is not a weakly prime, because it can be changed into another prime (1213430173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606715061 + 606715062.

It is an arithmetic number, because the mean of its divisors is an integer number (606715062).

Almost surely, 2^1213430123 is an apocalyptic number.

1213430123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213430123 is an equidigital number, since it uses as much as digits as its factorization.

1213430123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1213430123 is about 34834.3239205241. The cubic root of 1213430123 is about 1066.6082142557.

Adding to 1213430123 its reverse (3210343121), we get a palindrome (4423773244).

The spelling of 1213430123 in words is "one billion, two hundred thirteen million, four hundred thirty thousand, one hundred twenty-three".