11891220803 has 16 divisors (see below), whose sum is σ = 14832579840. Its totient is φ = 9261410400.

The previous prime is 11891220797. The next prime is 11891220833. The reversal of 11891220803 is 30802219811.

It is not a de Polignac number, because 11891220803 - 2⁴ = 11891220787 is a prime.

It is a super-2 number, since 2×11891220803² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11891220833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127853 + ... + 200321.

It is an arithmetic number, because the mean of its divisors is an integer number (927036240).

Almost surely, 2^11891220803 is an apocalyptic number.

11891220803 is a deficient number, since it is larger than the sum of its proper divisors (2941359037).

11891220803 is a wasteful number, since it uses less digits than its factorization.

11891220803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74618.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 11891220803 in words is "eleven billion, eight hundred ninety-one million, two hundred twenty thousand, eight hundred three".