1213111033 has 2 divisors, whose sum is σ = 1213111034. Its totient is φ = 1213111032.

The previous prime is 1213111021. The next prime is 1213111049. The reversal of 1213111033 is 3301113121.

It is an a-pointer prime, because the next prime (1213111049) can be obtained adding 1213111033 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940464889 + 272646144 = 30667^2 + 16512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213111033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213110998 and 1213111016.

It is not a weakly prime, because it can be changed into another prime (1213111063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606555516 + 606555517.

It is an arithmetic number, because the mean of its divisors is an integer number (606555517).

Almost surely, 2^1213111033 is an apocalyptic number.

It is an amenable number.

1213111033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213111033 is an equidigital number, since it uses as much as digits as its factorization.

1213111033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1213111033 is about 34829.7435103964. The cubic root of 1213111033 is about 1066.5147124144.

Adding to 1213111033 its reverse (3301113121), we get a palindrome (4514224154).

The spelling of 1213111033 in words is "one billion, two hundred thirteen million, one hundred eleven thousand, thirty-three".