1213118047 has 2 divisors, whose sum is σ = 1213118048. Its totient is φ = 1213118046.

The previous prime is 1213118017. The next prime is 1213118059. The reversal of 1213118047 is 7408113121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213118047 - 2¹¹ = 1213115999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213118017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606559023 + 606559024.

It is an arithmetic number, because the mean of its divisors is an integer number (606559024).

Almost surely, 2^1213118047 is an apocalyptic number.

1213118047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213118047 is an equidigital number, since it uses as much as digits as its factorization.

1213118047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1213118047 is about 34829.8442000535. The cubic root of 1213118047 is about 1066.5167678788.

The spelling of 1213118047 in words is "one billion, two hundred thirteen million, one hundred eighteen thousand, forty-seven".