2126221403 has 2 divisors, whose sum is σ = 2126221404. Its totient is φ = 2126221402.

The previous prime is 2126221393. The next prime is 2126221417. The reversal of 2126221403 is 3041226212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2126221403 - 2¹² = 2126217307 is a prime.

It is not a weakly prime, because it can be changed into another prime (2126221463) 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, 1063110701 + 1063110702.

It is an arithmetic number, because the mean of its divisors is an integer number (1063110702).

Almost surely, 2^2126221403 is an apocalyptic number.

2126221403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126221403 is an equidigital number, since it uses as much as digits as its factorization.

2126221403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2126221403 is about 46110.9683589490. The cubic root of 2126221403 is about 1285.8870674492.

Adding to 2126221403 its reverse (3041226212), we get a palindrome (5167447615).

The spelling of 2126221403 in words is "two billion, one hundred twenty-six million, two hundred twenty-one thousand, four hundred three".