220111211101 has 4 divisors (see below), whose sum is σ = 220120185852. Its totient is φ = 220102236352.

The previous prime is 220111211063. The next prime is 220111211123. The reversal of 220111211101 is 101112111022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31973016100 + 188138195001 = 178810^2 + 433749^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111211101 - 2²¹ = 220109113949 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 (220111211141) 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, 4450486 + ... + 4499671.

It is an arithmetic number, because the mean of its divisors is an integer number (55030046463).

Almost surely, 2^220111211101 is an apocalyptic number.

It is an amenable number.

220111211101 is a deficient number, since it is larger than the sum of its proper divisors (8974751).

220111211101 is an equidigital number, since it uses as much as digits as its factorization.

220111211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974750.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 220111211101 its reverse (101112111022), we get a palindrome (321223322123).

The spelling of 220111211101 in words is "two hundred twenty billion, one hundred eleven million, two hundred eleven thousand, one hundred one".