11100420109 has 2 divisors, whose sum is σ = 11100420110. Its totient is φ = 11100420108.

The previous prime is 11100420053. The next prime is 11100420167. The reversal of 11100420109 is 90102400111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10897272100 + 203148009 = 104390^2 + 14253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100420109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100420809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550210054 + 5550210055.

It is an arithmetic number, because the mean of its divisors is an integer number (5550210055).

Almost surely, 2^11100420109 is an apocalyptic number.

It is an amenable number.

11100420109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100420109 is an equidigital number, since it uses as much as digits as its factorization.

11100420109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 11100420109 in words is "eleven billion, one hundred million, four hundred twenty thousand, one hundred nine".