11020099991 has 2 divisors, whose sum is σ = 11020099992. Its totient is φ = 11020099990.

The previous prime is 11020099957. The next prime is 11020100081. The reversal of 11020099991 is 19999002011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11020099991 - 2⁶ = 11020099927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11020029991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510049995 + 5510049996.

It is an arithmetic number, because the mean of its divisors is an integer number (5510049996).

Almost surely, 2^11020099991 is an apocalyptic number.

11020099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020099991 is an equidigital number, since it uses as much as digits as its factorization.

11020099991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 41.

The spelling of 11020099991 in words is "eleven billion, twenty million, ninety-nine thousand, nine hundred ninety-one".