1312211429 has 2 divisors, whose sum is σ = 1312211430. Its totient is φ = 1312211428.

The previous prime is 1312211363. The next prime is 1312211477. The reversal of 1312211429 is 9241122131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306461025 + 5750404 = 36145^2 + 2398^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312211429 - 2¹² = 1312207333 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 = 1312211398 and 1312211407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312211729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656105714 + 656105715.

It is an arithmetic number, because the mean of its divisors is an integer number (656105715).

Almost surely, 2^1312211429 is an apocalyptic number.

It is an amenable number.

1312211429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312211429 is an equidigital number, since it uses as much as digits as its factorization.

1312211429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 1312211429 is about 36224.4589883686. The cubic root of 1312211429 is about 1094.7995376799.

The spelling of 1312211429 in words is "one billion, three hundred twelve million, two hundred eleven thousand, four hundred twenty-nine".