220111111001 has 4 divisors (see below), whose sum is σ = 220247067600. Its totient is φ = 219975154404.

The previous prime is 220111110997. The next prime is 220111111013. The reversal of 220111111001 is 100111111022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220111111001 - 2² = 220111110997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220111111091) 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, 67975871 + ... + 67979108.

It is an arithmetic number, because the mean of its divisors is an integer number (55061766900).

Almost surely, 2^220111111001 is an apocalyptic number.

It is an amenable number.

220111111001 is a deficient number, since it is larger than the sum of its proper divisors (135956599).

220111111001 is a wasteful number, since it uses less digits than its factorization.

220111111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135956598.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 220111111001 its reverse (100111111022), we get a palindrome (320222222023).

The spelling of 220111111001 in words is "two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, one".