11201321999 has 4 divisors (see below), whose sum is σ = 12801510864. Its totient is φ = 9601133136.

The previous prime is 11201321993. The next prime is 11201322001. The reversal of 11201321999 is 99912310211.

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

It is not a de Polignac number, because 11201321999 - 2⁴ = 11201321983 is a prime.

It is a super-2 number, since 2×11201321999² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201321993) 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, 800094422 + ... + 800094435.

It is an arithmetic number, because the mean of its divisors is an integer number (3200377716).

Almost surely, 2^11201321999 is an apocalyptic number.

11201321999 is a deficient number, since it is larger than the sum of its proper divisors (1600188865).

11201321999 is an equidigital number, since it uses as much as digits as its factorization.

11201321999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600188864.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 11201321999 in words is "eleven billion, two hundred one million, three hundred twenty-one thousand, nine hundred ninety-nine".