13020021191 has 2 divisors, whose sum is σ = 13020021192. Its totient is φ = 13020021190.

The previous prime is 13020021167. The next prime is 13020021241. The reversal of 13020021191 is 19112002031.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13020021191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13020021121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510010595 + 6510010596.

It is an arithmetic number, because the mean of its divisors is an integer number (6510010596).

Almost surely, 2^13020021191 is an apocalyptic number.

13020021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

13020021191 is an equidigital number, since it uses as much as digits as its factorization.

13020021191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 13020021191 in words is "thirteen billion, twenty million, twenty-one thousand, one hundred ninety-one".