11020100081 has 2 divisors, whose sum is σ = 11020100082. Its totient is φ = 11020100080.

The previous prime is 11020099991. The next prime is 11020100087. The reversal of 11020100081 is 18000102011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8675991025 + 2344109056 = 93145^2 + 48416^2 .

It is an emirp because it is prime and its reverse (18000102011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020100081 is a prime.

It is a super-2 number, since 2×11020100081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11020100087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510050040 + 5510050041.

It is an arithmetic number, because the mean of its divisors is an integer number (5510050041).

Almost surely, 2^11020100081 is an apocalyptic number.

It is an amenable number.

11020100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020100081 is an equidigital number, since it uses as much as digits as its factorization.

11020100081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11020100081 its reverse (18000102011), we get a palindrome (29020202092).

The spelling of 11020100081 in words is "eleven billion, twenty million, one hundred thousand, eighty-one".