11212021109999 has 4 divisors (see below), whose sum is σ = 11213254429080. Its totient is φ = 11210787790920.

The previous prime is 11212021109987. The next prime is 11212021110233. The reversal of 11212021109999 is 99990112021211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11212021109999 - 2²⁴ = 11212004332783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212021109969) 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, 616645904 + ... + 616664085.

It is an arithmetic number, because the mean of its divisors is an integer number (2803313607270).

Almost surely, 2^{11212021109999} is an apocalyptic number.

11212021109999 is a deficient number, since it is larger than the sum of its proper divisors (1233319081).

11212021109999 is an equidigital number, since it uses as much as digits as its factorization.

11212021109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233319080.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 11212021109999 in words is "eleven trillion, two hundred twelve billion, twenty-one million, one hundred nine thousand, nine hundred ninety-nine".