201321213391 has 2 divisors, whose sum is σ = 201321213392. Its totient is φ = 201321213390.

The previous prime is 201321213383. The next prime is 201321213427. The reversal of 201321213391 is 193312123102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201321213391 - 2³ = 201321213383 is a prime.

It is a super-2 number, since 2×201321213391² (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 (201321013391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660606695 + 100660606696.

It is an arithmetic number, because the mean of its divisors is an integer number (100660606696).

Almost surely, 2^201321213391 is an apocalyptic number.

201321213391 is a deficient number, since it is larger than the sum of its proper divisors (1).

201321213391 is an equidigital number, since it uses as much as digits as its factorization.

201321213391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 201321213391 its reverse (193312123102), we get a palindrome (394633336493).

The spelling of 201321213391 in words is "two hundred one billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred ninety-one".