201123131103121 has 2 divisors, whose sum is σ = 201123131103122. Its totient is φ = 201123131103120.

The previous prime is 201123131103109. The next prime is 201123131103131. The reversal of 201123131103121 is 121301131321102.

201123131103121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107301919864896 + 93821211238225 = 10358664^2 + 9686135^2 .

It is a cyclic number.

It is not a de Polignac number, because 201123131103121 - 2¹⁹ = 201123130578833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201123131103092 and 201123131103101.

It is not a weakly prime, because it can be changed into another prime (201123131103131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561565551560 + 100561565551561.

It is an arithmetic number, because the mean of its divisors is an integer number (100561565551561).

Almost surely, 2^{201123131103121} is an apocalyptic number.

It is an amenable number.

201123131103121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123131103121 is an equidigital number, since it uses as much as digits as its factorization.

201123131103121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 201123131103121 its reverse (121301131321102), we get a palindrome (322424262424223).

The spelling of 201123131103121 in words is "two hundred one trillion, one hundred twenty-three billion, one hundred thirty-one million, one hundred three thousand, one hundred twenty-one".