201123109951 has 2 divisors, whose sum is σ = 201123109952. Its totient is φ = 201123109950.

The previous prime is 201123109939. The next prime is 201123110051. The reversal of 201123109951 is 159901321102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201123109951 - 2²³ = 201114721343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201123109921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561554975 + 100561554976.

It is an arithmetic number, because the mean of its divisors is an integer number (100561554976).

Almost surely, 2^201123109951 is an apocalyptic number.

201123109951 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123109951 is an equidigital number, since it uses as much as digits as its factorization.

201123109951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 34.

The spelling of 201123109951 in words is "two hundred one billion, one hundred twenty-three million, one hundred nine thousand, nine hundred fifty-one".