1194218396831 has 2 divisors, whose sum is σ = 1194218396832. Its totient is φ = 1194218396830.

The previous prime is 1194218396783. The next prime is 1194218396887. The reversal of 1194218396831 is 1386938124911.

It is a happy number.

It is an a-pointer prime, because the next prime (1194218396887) can be obtained adding 1194218396831 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1194218396831 - 2¹⁴ = 1194218380447 is a prime.

It is a super-2 number, since 2×1194218396831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1194218396431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597109198415 + 597109198416.

It is an arithmetic number, because the mean of its divisors is an integer number (597109198416).

Almost surely, 2^{1194218396831} is an apocalyptic number.

1194218396831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194218396831 is an equidigital number, since it uses as much as digits as its factorization.

1194218396831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The spelling of 1194218396831 in words is "one trillion, one hundred ninety-four billion, two hundred eighteen million, three hundred ninety-six thousand, eight hundred thirty-one".