11212020191 has 2 divisors, whose sum is σ = 11212020192. Its totient is φ = 11212020190.

The previous prime is 11212020181. The next prime is 11212020229. The reversal of 11212020191 is 19102021211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11212020191 - 2¹⁰ = 11212019167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212020181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606010095 + 5606010096.

It is an arithmetic number, because the mean of its divisors is an integer number (5606010096).

Almost surely, 2^11212020191 is an apocalyptic number.

11212020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212020191 is an equidigital number, since it uses as much as digits as its factorization.

11212020191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 11212020191 in words is "eleven billion, two hundred twelve million, twenty thousand, one hundred ninety-one".