201340212991 has 2 divisors, whose sum is σ = 201340212992. Its totient is φ = 201340212990.

The previous prime is 201340212977. The next prime is 201340213001. The reversal of 201340212991 is 199212043102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201340212991 - 2²⁵ = 201306658559 is a prime.

It is a super-2 number, since 2×201340212991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201340212901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100670106495 + 100670106496.

It is an arithmetic number, because the mean of its divisors is an integer number (100670106496).

Almost surely, 2^201340212991 is an apocalyptic number.

201340212991 is a deficient number, since it is larger than the sum of its proper divisors (1).

201340212991 is an equidigital number, since it uses as much as digits as its factorization.

201340212991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 201340212991 in words is "two hundred one billion, three hundred forty million, two hundred twelve thousand, nine hundred ninety-one".