1213030111 has 2 divisors, whose sum is σ = 1213030112. Its totient is φ = 1213030110.

The previous prime is 1213030103. The next prime is 1213030127. The reversal of 1213030111 is 1110303121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213030111 - 2³ = 1213030103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213030091 and 1213030100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213030411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606515055 + 606515056.

It is an arithmetic number, because the mean of its divisors is an integer number (606515056).

Almost surely, 2^1213030111 is an apocalyptic number.

1213030111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213030111 is an equidigital number, since it uses as much as digits as its factorization.

1213030111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1213030111 is about 34828.5818114950. The cubic root of 1213030111 is about 1066.4909975138.

Adding to 1213030111 its reverse (1110303121), we get a palindrome (2323333232).

The spelling of 1213030111 in words is "one billion, two hundred thirteen million, thirty thousand, one hundred eleven".