2221121120 has 48 divisors (see below), whose sum is σ = 5251055040. Its totient is φ = 887829504.

The previous prime is 2221121117. The next prime is 2221121129. The reversal of 2221121120 is 211211222.

It is a junction number, because it is equal to n+sod(n) for n = 2221121095 and 2221121104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276521 + ... + 284439.

It is an arithmetic number, because the mean of its divisors is an integer number (109396980).

Almost surely, 2^2221121120 is an apocalyptic number.

2221121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221121120 is an abundant number, since it is smaller than the sum of its proper divisors (3029933920).

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

2221121120 is a wasteful number, since it uses less digits than its factorization.

2221121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9687 (or 9679 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2221121120 is about 47128.7716793044. The cubic root of 2221121120 is about 1304.7403113082.

Adding to 2221121120 its reverse (211211222), we get a palindrome (2432332342).

It can be divided in two parts, 2 and 221121120, that added together give a palindrome (221121122).

The spelling of 2221121120 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty".