1822126021 has 2 divisors, whose sum is σ = 1822126022. Its totient is φ = 1822126020.

The previous prime is 1822126003. The next prime is 1822126027. The reversal of 1822126021 is 1206212281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1796572996 + 25553025 = 42386^2 + 5055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822126021 - 2¹¹ = 1822123973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1822126027) 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, 911063010 + 911063011.

It is an arithmetic number, because the mean of its divisors is an integer number (911063011).

Almost surely, 2^1822126021 is an apocalyptic number.

It is an amenable number.

1822126021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822126021 is an equidigital number, since it uses as much as digits as its factorization.

1822126021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1822126021 is about 42686.3680933387. The cubic root of 1822126021 is about 1221.4043715311.

The spelling of 1822126021 in words is "one billion, eight hundred twenty-two million, one hundred twenty-six thousand, twenty-one".