2111221444 has 6 divisors (see below), whose sum is σ = 3694637534. Its totient is φ = 1055610720.

The previous prime is 2111221433. The next prime is 2111221471. The reversal of 2111221444 is 4441221112.

It can be written as a sum of positive squares in only one way, i.e., 2110299844 + 921600 = 45938^2 + 960^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263902677 + ... + 263902684.

Almost surely, 2^2111221444 is an apocalyptic number.

It is an amenable number.

2111221444 is a deficient number, since it is larger than the sum of its proper divisors (1583416090).

2111221444 is a wasteful number, since it uses less digits than its factorization.

2111221444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527805365 (or 527805363 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 2111221444 is about 45948.0298163044. The cubic root of 2111221444 is about 1282.8560582598.

Adding to 2111221444 its reverse (4441221112), we get a palindrome (6552442556).

The spelling of 2111221444 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, four hundred forty-four".