2222221001 has 48 divisors (see below), whose sum is σ = 3074355648. Its totient is φ = 1578729600.

The previous prime is 2222220997. The next prime is 2222221007. The reversal of 2222221001 is 1001222222.

It is not a de Polignac number, because 2222221001 - 2² = 2222220997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2222221007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 579671 + ... + 583491.

It is an arithmetic number, because the mean of its divisors is an integer number (64049076).

Almost surely, 2^2222221001 is an apocalyptic number.

It is an amenable number.

2222221001 is a deficient number, since it is larger than the sum of its proper divisors (852134647).

2222221001 is a wasteful number, since it uses less digits than its factorization.

2222221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942 (or 3935 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2222221001 is about 47140.4391260837. The cubic root of 2222221001 is about 1304.9556413434.

Adding to 2222221001 its reverse (1001222222), we get a palindrome (3223443223).

It can be divided in two parts, 222222 and 1001, that multiplied together give a palindrome (222444222).

The spelling of 2222221001 in words is "two billion, two hundred twenty-two million, two hundred twenty-one thousand, one".