1212224129 has 2 divisors, whose sum is σ = 1212224130. Its totient is φ = 1212224128.

The previous prime is 1212224113. The next prime is 1212224179. The reversal of 1212224129 is 9214222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770173504 + 442050625 = 27752^2 + 21025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212224129 - 2⁴ = 1212224113 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 = 1212224098 and 1212224107.

It is not a weakly prime, because it can be changed into another prime (1212224179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606112064 + 606112065.

It is an arithmetic number, because the mean of its divisors is an integer number (606112065).

Almost surely, 2^1212224129 is an apocalyptic number.

It is an amenable number.

1212224129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212224129 is an equidigital number, since it uses as much as digits as its factorization.

1212224129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1212224129 is about 34817.0091909113. The cubic root of 1212224129 is about 1066.2547398461.

The spelling of 1212224129 in words is "one billion, two hundred twelve million, two hundred twenty-four thousand, one hundred twenty-nine".