1230122021 has 2 divisors, whose sum is σ = 1230122022. Its totient is φ = 1230122020.

The previous prime is 1230121999. The next prime is 1230122039. The reversal of 1230122021 is 1202210321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196191396 + 33930625 = 34586^2 + 5825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230122021 - 2¹⁸ = 1229859877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1230121987 and 1230122005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615061010 + 615061011.

It is an arithmetic number, because the mean of its divisors is an integer number (615061011).

Almost surely, 2^1230122021 is an apocalyptic number.

It is an amenable number.

1230122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230122021 is an equidigital number, since it uses as much as digits as its factorization.

1230122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1230122021 is about 35073.0954008910. The cubic root of 1230122021 is about 1071.4766989624.

Adding to 1230122021 its reverse (1202210321), we get a palindrome (2432332342).

The spelling of 1230122021 in words is "one billion, two hundred thirty million, one hundred twenty-two thousand, twenty-one".