2111121239 has 2 divisors, whose sum is σ = 2111121240. Its totient is φ = 2111121238.

The previous prime is 2111121209. The next prime is 2111121241. The reversal of 2111121239 is 9321211112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111121239 - 2⁸ = 2111120983 is a prime.

Together with 2111121241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055560619 + 1055560620.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560620).

Almost surely, 2^2111121239 is an apocalyptic number.

2111121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111121239 is an equidigital number, since it uses as much as digits as its factorization.

2111121239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 23.

The square root of 2111121239 is about 45946.9393866447. The cubic root of 2111121239 is about 1282.8357618535.

The spelling of 2111121239 in words is "two billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirty-nine".