2103240991 has 2 divisors, whose sum is σ = 2103240992. Its totient is φ = 2103240990.

The previous prime is 2103240989. The next prime is 2103241057. The reversal of 2103240991 is 1990423012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2103240991 - 2¹ = 2103240989 is a prime.

Together with 2103240989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103240941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051620495 + 1051620496.

It is an arithmetic number, because the mean of its divisors is an integer number (1051620496).

Almost surely, 2^2103240991 is an apocalyptic number.

2103240991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103240991 is an equidigital number, since it uses as much as digits as its factorization.

2103240991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2103240991 is about 45861.1054271482. The cubic root of 2103240991 is about 1281.2376113781.

The spelling of 2103240991 in words is "two billion, one hundred three million, two hundred forty thousand, nine hundred ninety-one".