201110231957 has 2 divisors, whose sum is σ = 201110231958. Its totient is φ = 201110231956.

The previous prime is 201110231899. The next prime is 201110232047. The reversal of 201110231957 is 759132011102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122381728561 + 78728503396 = 349831^2 + 280586^2 .

It is a cyclic number.

It is not a de Polignac number, because 201110231957 - 2²⁰ = 201109183381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201110231657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555115978 + 100555115979.

It is an arithmetic number, because the mean of its divisors is an integer number (100555115979).

Almost surely, 2^201110231957 is an apocalyptic number.

It is an amenable number.

201110231957 is a deficient number, since it is larger than the sum of its proper divisors (1).

201110231957 is an equidigital number, since it uses as much as digits as its factorization.

201110231957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 201110231957 in words is "two hundred one billion, one hundred ten million, two hundred thirty-one thousand, nine hundred fifty-seven".