30640111213 has 2 divisors, whose sum is σ = 30640111214. Its totient is φ = 30640111212.

The previous prime is 30640111147. The next prime is 30640111217. The reversal of 30640111213 is 31211104603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18666937129 + 11973174084 = 136627^2 + 109422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30640111213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30640111217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320055606 + 15320055607.

It is an arithmetic number, because the mean of its divisors is an integer number (15320055607).

Almost surely, 2^30640111213 is an apocalyptic number.

It is an amenable number.

30640111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640111213 is an equidigital number, since it uses as much as digits as its factorization.

30640111213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 30640111213 its reverse (31211104603), we get a palindrome (61851215816).

The spelling of 30640111213 in words is "thirty billion, six hundred forty million, one hundred eleven thousand, two hundred thirteen".