2101323149 has 2 divisors, whose sum is σ = 2101323150. Its totient is φ = 2101323148.

The previous prime is 2101323121. The next prime is 2101323157. The reversal of 2101323149 is 9413231012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2086845124 + 14478025 = 45682^2 + 3805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101323149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101323109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050661574 + 1050661575.

It is an arithmetic number, because the mean of its divisors is an integer number (1050661575).

Almost surely, 2^2101323149 is an apocalyptic number.

It is an amenable number.

2101323149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101323149 is an equidigital number, since it uses as much as digits as its factorization.

2101323149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2101323149 is about 45840.1914153944. The cubic root of 2101323149 is about 1280.8480604324.

The spelling of 2101323149 in words is "two billion, one hundred one million, three hundred twenty-three thousand, one hundred forty-nine".