1210222121 has 2 divisors, whose sum is σ = 1210222122. Its totient is φ = 1210222120.

The previous prime is 1210222103. The next prime is 1210222151. The reversal of 1210222121 is 1212220121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1117966096 + 92256025 = 33436^2 + 9605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210222121 - 2³⁰ = 136480297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210222096 and 1210222105.

It is not a weakly prime, because it can be changed into another prime (1210222151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605111060 + 605111061.

It is an arithmetic number, because the mean of its divisors is an integer number (605111061).

Almost surely, 2^1210222121 is an apocalyptic number.

It is an amenable number.

1210222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210222121 is an equidigital number, since it uses as much as digits as its factorization.

1210222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1210222121 is about 34788.2468802324. The cubic root of 1210222121 is about 1065.6674373596.

Adding to 1210222121 its reverse (1212220121), we get a palindrome (2422442242).

The spelling of 1210222121 in words is "one billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".