2126363381 has 2 divisors, whose sum is σ = 2126363382. Its totient is φ = 2126363380.

The previous prime is 2126363329. The next prime is 2126363387. The reversal of 2126363381 is 1833636212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1510876900 + 615486481 = 38870^2 + 24809^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126363381 - 2²⁶ = 2059254517 is a prime.

It is a super-2 number, since 2×2126363381² = 9042842456115502322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126363387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063181690 + 1063181691.

It is an arithmetic number, because the mean of its divisors is an integer number (1063181691).

Almost surely, 2^2126363381 is an apocalyptic number.

It is an amenable number.

2126363381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126363381 is an equidigital number, since it uses as much as digits as its factorization.

2126363381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 2126363381 is about 46112.5078584976. The cubic root of 2126363381 is about 1285.9156884276.

Adding to 2126363381 its reverse (1833636212), we get a palindrome (3959999593).

The spelling of 2126363381 in words is "two billion, one hundred twenty-six million, three hundred sixty-three thousand, three hundred eighty-one".