11221019979 has 32 divisors (see below), whose sum is σ = 16500067584. Its totient is φ = 6739286400.

The previous prime is 11221019857. The next prime is 11221019987. The reversal of 11221019979 is 97991012211.

It is not a de Polignac number, because 11221019979 - 2¹³ = 11221011787 is a prime.

It is a super-2 number, since 2×11221019979² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221019979.

It is not an unprimeable number, because it can be changed into a prime (11221015979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3397629 + ... + 3400929.

It is an arithmetic number, because the mean of its divisors is an integer number (515627112).

Almost surely, 2^11221019979 is an apocalyptic number.

11221019979 is a deficient number, since it is larger than the sum of its proper divisors (5279047605).

11221019979 is a wasteful number, since it uses less digits than its factorization.

11221019979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387.

The product of its (nonzero) digits is 20412, while the sum is 42.

The spelling of 11221019979 in words is "eleven billion, two hundred twenty-one million, nineteen thousand, nine hundred seventy-nine".