1213113001 has 2 divisors, whose sum is σ = 1213113002. Its totient is φ = 1213113000.

The previous prime is 1213112981. The next prime is 1213113053. The reversal of 1213113001 is 1003113121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100646976 + 112466025 = 33176^2 + 10605^2 .

It is an emirp because it is prime and its reverse (1003113121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213113001 - 2¹¹ = 1213110953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213113401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606556500 + 606556501.

It is an arithmetic number, because the mean of its divisors is an integer number (606556501).

Almost surely, 2^1213113001 is an apocalyptic number.

It is an amenable number.

1213113001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213113001 is an equidigital number, since it uses as much as digits as its factorization.

1213113001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1213113001 is about 34829.7717621003. The cubic root of 1213113001 is about 1066.5152891409.

Adding to 1213113001 its reverse (1003113121), we get a palindrome (2216226122).

The spelling of 1213113001 in words is "one billion, two hundred thirteen million, one hundred thirteen thousand, one".