11100120021157 has 2 divisors, whose sum is σ = 11100120021158. Its totient is φ = 11100120021156.

The previous prime is 11100120021119. The next prime is 11100120021169. The reversal of 11100120021157 is 75112002100111.

11100120021157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8488563828196 + 2611556192961 = 2913514^2 + 1616031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100120021157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100120022157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550060010578 + 5550060010579.

It is an arithmetic number, because the mean of its divisors is an integer number (5550060010579).

Almost surely, 2^{11100120021157} is an apocalyptic number.

It is an amenable number.

11100120021157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100120021157 is an equidigital number, since it uses as much as digits as its factorization.

11100120021157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 22.

Adding to 11100120021157 its reverse (75112002100111), we get a palindrome (86212122121268).

The spelling of 11100120021157 in words is "eleven trillion, one hundred billion, one hundred twenty million, twenty-one thousand, one hundred fifty-seven".