1234512121 has 2 divisors, whose sum is σ = 1234512122. Its totient is φ = 1234512120.

The previous prime is 1234512077. The next prime is 1234512133. The reversal of 1234512121 is 1212154321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1233765625 + 746496 = 35125^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234512121 - 2¹⁵ = 1234479353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1234512092 and 1234512101.

It is not a weakly prime, because it can be changed into another prime (1234542121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617256060 + 617256061.

It is an arithmetic number, because the mean of its divisors is an integer number (617256061).

Almost surely, 2^1234512121 is an apocalyptic number.

It is an amenable number.

1234512121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234512121 is an equidigital number, since it uses as much as digits as its factorization.

1234512121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 1234512121 is about 35135.6246706957. The cubic root of 1234512121 is about 1072.7498260845.

Adding to 1234512121 its reverse (1212154321), we get a palindrome (2446666442).

The spelling of 1234512121 in words is "one billion, two hundred thirty-four million, five hundred twelve thousand, one hundred twenty-one".