201211130123 has 4 divisors (see below), whose sum is σ = 203967447048. Its totient is φ = 198454813200.

The previous prime is 201211130119. The next prime is 201211130129. The reversal of 201211130123 is 321031112102.

201211130123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321031112102 = 2 ⋅160515556051.

It is a cyclic number.

It is not a de Polignac number, because 201211130123 - 2² = 201211130119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211130129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378158353 + ... + 1378158498.

It is an arithmetic number, because the mean of its divisors is an integer number (50991861762).

Almost surely, 2^201211130123 is an apocalyptic number.

201211130123 is a deficient number, since it is larger than the sum of its proper divisors (2756316925).

201211130123 is an equidigital number, since it uses as much as digits as its factorization.

201211130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756316924.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 201211130123 its reverse (321031112102), we get a palindrome (522242242225).

The spelling of 201211130123 in words is "two hundred one billion, two hundred eleven million, one hundred thirty thousand, one hundred twenty-three".