11101021993 has 4 divisors (see below), whose sum is σ = 11101877248. Its totient is φ = 11100166740.

The previous prime is 11101021957. The next prime is 11101022011. The reversal of 11101021993 is 39912010111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39912010111 = 5179 ⋅7706509.

It is a cyclic number.

It is not a de Polignac number, because 11101021993 - 2³³ = 2511087401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101021193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407853 + ... + 434218.

It is an arithmetic number, because the mean of its divisors is an integer number (2775469312).

Almost surely, 2^11101021993 is an apocalyptic number.

It is an amenable number.

11101021993 is a deficient number, since it is larger than the sum of its proper divisors (855255).

11101021993 is an equidigital number, since it uses as much as digits as its factorization.

11101021993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855254.

The product of its (nonzero) digits is 486, while the sum is 28.

The spelling of 11101021993 in words is "eleven billion, one hundred one million, twenty-one thousand, nine hundred ninety-three".