4012222221 has 32 divisors (see below), whose sum is σ = 6803431680. Its totient is φ = 2289238848.

The previous prime is 4012222211. The next prime is 4012222223. The reversal of 4012222221 is 1222222104.

4012222221 is a `hidden beast` number, since 401 + 22 + 22 + 221 = 666.

It is not a de Polignac number, because 4012222221 - 2¹⁰ = 4012221197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4012222194 and 4012222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012222223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112275 + ... + 143631.

It is an arithmetic number, because the mean of its divisors is an integer number (212607240).

Almost surely, 2^4012222221 is an apocalyptic number.

It is an amenable number.

4012222221 is a deficient number, since it is larger than the sum of its proper divisors (2791209459).

4012222221 is a wasteful number, since it uses less digits than its factorization.

4012222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32050 (or 32044 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4012222221 is about 63342.1046461199. The cubic root of 4012222221 is about 1589.0162052262.

Adding to 4012222221 its reverse (1222222104), we get a palindrome (5234444325).

The spelling of 4012222221 in words is "four billion, twelve million, two hundred twenty-two thousand, two hundred twenty-one".