201223031101 has 2 divisors, whose sum is σ = 201223031102. Its totient is φ = 201223031100.

The previous prime is 201223031099. The next prime is 201223031123. The reversal of 201223031101 is 101130322102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181552688100 + 19670343001 = 426090^2 + 140251^2 .

It is a cyclic number.

It is not a de Polignac number, because 201223031101 - 2¹ = 201223031099 is a prime.

Together with 201223031099, 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 (201223031171) 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, 100611515550 + 100611515551.

It is an arithmetic number, because the mean of its divisors is an integer number (100611515551).

Almost surely, 2^201223031101 is an apocalyptic number.

It is an amenable number.

201223031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201223031101 is an equidigital number, since it uses as much as digits as its factorization.

201223031101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201223031101 its reverse (101130322102), we get a palindrome (302353353203).

The spelling of 201223031101 in words is "two hundred one billion, two hundred twenty-three million, thirty-one thousand, one hundred one".