11221197789 has 16 divisors (see below), whose sum is σ = 15271379712. Its totient is φ = 7326416448.

The previous prime is 11221197781. The next prime is 11221197809. The reversal of 11221197789 is 98779112211.

It is not a de Polignac number, because 11221197789 - 2³ = 11221197781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221197781) 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, 25212 + ... + 151914.

It is an arithmetic number, because the mean of its divisors is an integer number (954461232).

Almost surely, 2^11221197789 is an apocalyptic number.

It is an amenable number.

11221197789 is a deficient number, since it is larger than the sum of its proper divisors (4050181923).

11221197789 is a wasteful number, since it uses less digits than its factorization.

11221197789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127316.

The product of its digits is 127008, while the sum is 48.

It can be divided in two parts, 1122 and 1197789, that added together give a palindrome (1198911).

The spelling of 11221197789 in words is "eleven billion, two hundred twenty-one million, one hundred ninety-seven thousand, seven hundred eighty-nine".