2101303121 has 2 divisors, whose sum is σ = 2101303122. Its totient is φ = 2101303120.

The previous prime is 2101303097. The next prime is 2101303181. The reversal of 2101303121 is 1213031012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1946574400 + 154728721 = 44120^2 + 12439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101303121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101303096 and 2101303105.

It is not a weakly prime, because it can be changed into another prime (2101303181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050651560 + 1050651561.

It is an arithmetic number, because the mean of its divisors is an integer number (1050651561).

Almost surely, 2^2101303121 is an apocalyptic number.

It is an amenable number.

2101303121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101303121 is an equidigital number, since it uses as much as digits as its factorization.

2101303121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2101303121 is about 45839.9729602887. The cubic root of 2101303121 is about 1280.8439911064.

Adding to 2101303121 its reverse (1213031012), we get a palindrome (3314334133).

The spelling of 2101303121 in words is "two billion, one hundred one million, three hundred three thousand, one hundred twenty-one".