11199720541 has 2 divisors, whose sum is σ = 11199720542. Its totient is φ = 11199720540.

The previous prime is 11199720527. The next prime is 11199720577. The reversal of 11199720541 is 14502799111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10191912025 + 1007808516 = 100955^2 + 31746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11199720541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11199720494 and 11199720503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11199720041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599860270 + 5599860271.

It is an arithmetic number, because the mean of its divisors is an integer number (5599860271).

Almost surely, 2^11199720541 is an apocalyptic number.

It is an amenable number.

11199720541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199720541 is an equidigital number, since it uses as much as digits as its factorization.

11199720541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 11199720541 in words is "eleven billion, one hundred ninety-nine million, seven hundred twenty thousand, five hundred forty-one".