201111330421 has 2 divisors, whose sum is σ = 201111330422. Its totient is φ = 201111330420.

The previous prime is 201111330367. The next prime is 201111330449. The reversal of 201111330421 is 124033111102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194623027921 + 6488302500 = 441161^2 + 80550^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111330421 - 2¹³ = 201111322229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201111330451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555665210 + 100555665211.

It is an arithmetic number, because the mean of its divisors is an integer number (100555665211).

Almost surely, 2^201111330421 is an apocalyptic number.

It is an amenable number.

201111330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111330421 is an equidigital number, since it uses as much as digits as its factorization.

201111330421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201111330421 its reverse (124033111102), we get a palindrome (325144441523).

The spelling of 201111330421 in words is "two hundred one billion, one hundred eleven million, three hundred thirty thousand, four hundred twenty-one".