1201111993819 has 2 divisors, whose sum is σ = 1201111993820. Its totient is φ = 1201111993818.

The previous prime is 1201111993799. The next prime is 1201111993853. The reversal of 1201111993819 is 9183991111021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201111993819 - 2¹⁹ = 1201111469531 is a prime.

It is a super-2 number, since 2×1201111993819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201111993219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555996909 + 600555996910.

It is an arithmetic number, because the mean of its divisors is an integer number (600555996910).

Almost surely, 2^{1201111993819} is an apocalyptic number.

1201111993819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201111993819 is an equidigital number, since it uses as much as digits as its factorization.

1201111993819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 46.

The spelling of 1201111993819 in words is "one trillion, two hundred one billion, one hundred eleven million, nine hundred ninety-three thousand, eight hundred nineteen".