201114640165421 has 2 divisors, whose sum is σ = 201114640165422. Its totient is φ = 201114640165420.

The previous prime is 201114640165391. The next prime is 201114640165433. The reversal of 201114640165421 is 124561046411102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148822578909796 + 52292061255625 = 12199286^2 + 7231325^2 .

It is a cyclic number.

It is not a de Polignac number, because 201114640165421 - 2²⁶ = 201114573056557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201114640155421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100557320082710 + 100557320082711.

It is an arithmetic number, because the mean of its divisors is an integer number (100557320082711).

Almost surely, 2^{201114640165421} is an apocalyptic number.

It is an amenable number.

201114640165421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201114640165421 is an equidigital number, since it uses as much as digits as its factorization.

201114640165421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

Adding to 201114640165421 its reverse (124561046411102), we get a palindrome (325675686576523).

The spelling of 201114640165421 in words is "two hundred one trillion, one hundred fourteen billion, six hundred forty million, one hundred sixty-five thousand, four hundred twenty-one".