2113041421 has 2 divisors, whose sum is σ = 2113041422. Its totient is φ = 2113041420.

The previous prime is 2113041419. The next prime is 2113041431. The reversal of 2113041421 is 1241403112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111862025 + 1179396 = 45955^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113041421 - 2¹ = 2113041419 is a prime.

Together with 2113041419, 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 (2113041431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056520710 + 1056520711.

It is an arithmetic number, because the mean of its divisors is an integer number (1056520711).

Almost surely, 2^2113041421 is an apocalyptic number.

It is an amenable number.

2113041421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113041421 is an equidigital number, since it uses as much as digits as its factorization.

2113041421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2113041421 is about 45967.8302837974. The cubic root of 2113041421 is about 1283.2245807808.

Adding to 2113041421 its reverse (1241403112), we get a palindrome (3354444533).

The spelling of 2113041421 in words is "two billion, one hundred thirteen million, forty-one thousand, four hundred twenty-one".