201112320421 has 2 divisors, whose sum is σ = 201112320422. Its totient is φ = 201112320420.

The previous prime is 201112320419. The next prime is 201112320439. The reversal of 201112320421 is 124023211102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196200273025 + 4912047396 = 442945^2 + 70086^2 .

It is a cyclic number.

It is not a de Polignac number, because 201112320421 - 2¹ = 201112320419 is a prime.

Together with 201112320419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201112324421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556160210 + 100556160211.

It is an arithmetic number, because the mean of its divisors is an integer number (100556160211).

Almost surely, 2^201112320421 is an apocalyptic number.

It is an amenable number.

201112320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201112320421 is an equidigital number, since it uses as much as digits as its factorization.

201112320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 201112320421 its reverse (124023211102), we get a palindrome (325135531523).

The spelling of 201112320421 in words is "two hundred one billion, one hundred twelve million, three hundred twenty thousand, four hundred twenty-one".