11220021111 has 8 divisors (see below), whose sum is σ = 16110799600. Its totient is φ = 6904628352.

The previous prime is 11220021103. The next prime is 11220021119. The reversal of 11220021111 is 11112002211.

It is an interprime number because it is at equal distance from previous prime (11220021103) and next prime (11220021119).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11220021111 - 2³ = 11220021103 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 (11220021119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143846386 + ... + 143846463.

It is an arithmetic number, because the mean of its divisors is an integer number (2013849950).

Almost surely, 2^11220021111 is an apocalyptic number.

11220021111 is a deficient number, since it is larger than the sum of its proper divisors (4890778489).

11220021111 is a wasteful number, since it uses less digits than its factorization.

11220021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287692865.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11220021111 its reverse (11112002211), we get a palindrome (22332023322).

The spelling of 11220021111 in words is "eleven billion, two hundred twenty million, twenty-one thousand, one hundred eleven".