2112421291 has 2 divisors, whose sum is σ = 2112421292. Its totient is φ = 2112421290.

The previous prime is 2112421249. The next prime is 2112421327. The reversal of 2112421291 is 1921242112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112421291 - 2²³ = 2104032683 is a prime.

It is not a weakly prime, because it can be changed into another prime (2112421231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056210645 + 1056210646.

It is an arithmetic number, because the mean of its divisors is an integer number (1056210646).

Almost surely, 2^2112421291 is an apocalyptic number.

2112421291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112421291 is an equidigital number, since it uses as much as digits as its factorization.

2112421291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 2112421291 is about 45961.0845281092. The cubic root of 2112421291 is about 1283.0990360075.

The spelling of 2112421291 in words is "two billion, one hundred twelve million, four hundred twenty-one thousand, two hundred ninety-one".