201421342321231 has 2 divisors, whose sum is σ = 201421342321232. Its totient is φ = 201421342321230.

The previous prime is 201421342321223. The next prime is 201421342321259. The reversal of 201421342321231 is 132123243124102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201421342321231 - 2³ = 201421342321223 is a prime.

It is a super-2 number, since 2×201421342321231² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201421342321193 and 201421342321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201421342321531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100710671160615 + 100710671160616.

It is an arithmetic number, because the mean of its divisors is an integer number (100710671160616).

Almost surely, 2^{201421342321231} is an apocalyptic number.

201421342321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201421342321231 is an equidigital number, since it uses as much as digits as its factorization.

201421342321231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 201421342321231 its reverse (132123243124102), we get a palindrome (333544585445333).

The spelling of 201421342321231 in words is "two hundred one trillion, four hundred twenty-one billion, three hundred forty-two million, three hundred twenty-one thousand, two hundred thirty-one".