11101109861 has 2 divisors, whose sum is σ = 11101109862. Its totient is φ = 11101109860.

The previous prime is 11101109821. The next prime is 11101109867. The reversal of 11101109861 is 16890110111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10929657025 + 171452836 = 104545^2 + 13094^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101109861 - 2⁶ = 11101109797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101109867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550554930 + 5550554931.

It is an arithmetic number, because the mean of its divisors is an integer number (5550554931).

Almost surely, 2^11101109861 is an apocalyptic number.

It is an amenable number.

11101109861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101109861 is an equidigital number, since it uses as much as digits as its factorization.

11101109861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 29.

Adding to 11101109861 its reverse (16890110111), we get a palindrome (27991219972).

The spelling of 11101109861 in words is "eleven billion, one hundred one million, one hundred nine thousand, eight hundred sixty-one".