2103120091 has 2 divisors, whose sum is σ = 2103120092. Its totient is φ = 2103120090.

The previous prime is 2103120059. The next prime is 2103120137. The reversal of 2103120091 is 1900213012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2103120091 - 2⁵ = 2103120059 is a prime.

It is a super-2 number, since 2×2103120091² = 8846228234335696562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2103124091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051560045 + 1051560046.

It is an arithmetic number, because the mean of its divisors is an integer number (1051560046).

Almost surely, 2^2103120091 is an apocalyptic number.

2103120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103120091 is an equidigital number, since it uses as much as digits as its factorization.

2103120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 2103120091 is about 45859.7872978059. The cubic root of 2103120091 is about 1281.2130612361.

The spelling of 2103120091 in words is "two billion, one hundred three million, one hundred twenty thousand, ninety-one".