2111199888929 has 2 divisors, whose sum is σ = 2111199888930. Its totient is φ = 2111199888928.

The previous prime is 2111199888803. The next prime is 2111199888947. The reversal of 2111199888929 is 9298889911112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281548523025 + 829651365904 = 1132055^2 + 910852^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111199888929 - 2⁸ = 2111199888673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2111199888029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055599944464 + 1055599944465.

It is an arithmetic number, because the mean of its divisors is an integer number (1055599944465).

Almost surely, 2^{2111199888929} is an apocalyptic number.

It is an amenable number.

2111199888929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111199888929 is an equidigital number, since it uses as much as digits as its factorization.

2111199888929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 68.

The spelling of 2111199888929 in words is "two trillion, one hundred eleven billion, one hundred ninety-nine million, eight hundred eighty-eight thousand, nine hundred twenty-nine".