2442111221 has 4 divisors (see below), whose sum is σ = 2664121344. Its totient is φ = 2220101100.

The previous prime is 2442111209. The next prime is 2442111229. The reversal of 2442111221 is 1221112442.

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 2442111221 - 2²² = 2437916917 is a prime.

It is a super-2 number, since 2×2442111221² = 11927814431468221682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2442111193 and 2442111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2442111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111005045 + ... + 111005066.

It is an arithmetic number, because the mean of its divisors is an integer number (666030336).

Almost surely, 2^2442111221 is an apocalyptic number.

It is an amenable number.

2442111221 is a deficient number, since it is larger than the sum of its proper divisors (222010123).

2442111221 is a wasteful number, since it uses less digits than its factorization.

2442111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222010122.

The product of its digits is 256, while the sum is 20.

The square root of 2442111221 is about 49417.7217301648. The cubic root of 2442111221 is about 1346.6512742566.

Adding to 2442111221 its reverse (1221112442), we get a palindrome (3663223663).

The spelling of 2442111221 in words is "two billion, four hundred forty-two million, one hundred eleven thousand, two hundred twenty-one".