2104102381 has 2 divisors, whose sum is σ = 2104102382. Its totient is φ = 2104102380.

The previous prime is 2104102361. The next prime is 2104102409. The reversal of 2104102381 is 1832014012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082096900 + 22005481 = 45630^2 + 4691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104102381 - 2⁹ = 2104101869 is a prime.

It is a super-2 number, since 2×2104102381² = 8854493659459738322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104102331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052051190 + 1052051191.

It is an arithmetic number, because the mean of its divisors is an integer number (1052051191).

Almost surely, 2^2104102381 is an apocalyptic number.

It is an amenable number.

2104102381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104102381 is an equidigital number, since it uses as much as digits as its factorization.

2104102381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2104102381 is about 45870.4957570768. The cubic root of 2104102381 is about 1281.4124993467.

Adding to 2104102381 its reverse (1832014012), we get a palindrome (3936116393).

The spelling of 2104102381 in words is "two billion, one hundred four million, one hundred two thousand, three hundred eighty-one".