1213020013 has 2 divisors, whose sum is σ = 1213020014. Its totient is φ = 1213020012.

The previous prime is 1213020007. The next prime is 1213020041. The reversal of 1213020013 is 3100203121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 938687044 + 274332969 = 30638^2 + 16563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213019975 and 1213020002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213020043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606510006 + 606510007.

It is an arithmetic number, because the mean of its divisors is an integer number (606510007).

Almost surely, 2^1213020013 is an apocalyptic number.

It is an amenable number.

1213020013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213020013 is an equidigital number, since it uses as much as digits as its factorization.

1213020013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213020013 is about 34828.4368440503. The cubic root of 1213020013 is about 1066.4880381325.

Adding to 1213020013 its reverse (3100203121), we get a palindrome (4313223134).

The spelling of 1213020013 in words is "one billion, two hundred thirteen million, twenty thousand, thirteen".