2222111021 has 16 divisors (see below), whose sum is σ = 2568538224. Its totient is φ = 1904062464.

The previous prime is 2222111011. The next prime is 2222111033. The reversal of 2222111021 is 1201112222.

It can be written as a sum of positive squares in 8 ways, for example, as 37576900 + 2184534121 = 6130^2 + 46739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222110987 and 2222111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222111011) 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, 52736 + ... + 85001.

It is an arithmetic number, because the mean of its divisors is an integer number (160533639).

Almost surely, 2^2222111021 is an apocalyptic number.

It is an amenable number.

2222111021 is a deficient number, since it is larger than the sum of its proper divisors (346427203).

2222111021 is a wasteful number, since it uses less digits than its factorization.

2222111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137840.

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

The square root of 2222111021 is about 47139.2725972729. The cubic root of 2222111021 is about 1304.9341131232.

Adding to 2222111021 its reverse (1201112222), we get a palindrome (3423223243).

The spelling of 2222111021 in words is "two billion, two hundred twenty-two million, one hundred eleven thousand, twenty-one".