2221001121 has 16 divisors (see below), whose sum is σ = 3026592000. Its totient is φ = 1448085888.

The previous prime is 2221001099. The next prime is 2221001131. The reversal of 2221001121 is 1211001222.

It is not a de Polignac number, because 2221001121 - 2⁷ = 2221000993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221001097 and 2221001106.

It is not an unprimeable number, because it can be changed into a prime (2221001131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213325 + ... + 223493.

It is an arithmetic number, because the mean of its divisors is an integer number (189162000).

Almost surely, 2^2221001121 is an apocalyptic number.

It is an amenable number.

2221001121 is a deficient number, since it is larger than the sum of its proper divisors (805590879).

2221001121 is a wasteful number, since it uses less digits than its factorization.

2221001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11768.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2221001121 is about 47127.4985650628. The cubic root of 2221001121 is about 1304.7168141126.

Adding to 2221001121 its reverse (1211001222), we get a palindrome (3432002343).

The spelling of 2221001121 in words is "two billion, two hundred twenty-one million, one thousand, one hundred twenty-one".