221112211104 has 60 divisors (see below), whose sum is σ = 650284878474. Its totient is φ = 73704069504.

The previous prime is 221112211097. The next prime is 221112211109. The reversal of 221112211104 is 401112211122.

It can be written as a sum of positive squares in only one way, i.e., 220948882704 + 163328400 = 470052^2 + 12780^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221112211109) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42650227 + ... + 42655410.

Almost surely, 2^221112211104 is an apocalyptic number.

221112211104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221112211104 is an abundant number, since it is smaller than the sum of its proper divisors (429172667370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221112211104 is an equidigital number, since it uses as much as digits as its factorization.

221112211104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85305659 (or 85305642 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221112211104 its sum of digits (18), we get a palindrome (221112211122).

Adding to 221112211104 its reverse (401112211122), we get a palindrome (622224422226).

The spelling of 221112211104 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, one hundred four".