11218870613 has 2 divisors, whose sum is σ = 11218870614. Its totient is φ = 11218870612.

The previous prime is 11218870583. The next prime is 11218870687. The reversal of 11218870613 is 31607881211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9655617169 + 1563253444 = 98263^2 + 39538^2 .

It is a cyclic number.

It is not a de Polignac number, because 11218870613 - 2¹⁸ = 11218608469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11218870513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609435306 + 5609435307.

It is an arithmetic number, because the mean of its divisors is an integer number (5609435307).

Almost surely, 2^11218870613 is an apocalyptic number.

It is an amenable number.

11218870613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11218870613 is an equidigital number, since it uses as much as digits as its factorization.

11218870613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 11218870613 in words is "eleven billion, two hundred eighteen million, eight hundred seventy thousand, six hundred thirteen".