2221001231 has 8 divisors (see below), whose sum is σ = 2296178304. Its totient is φ = 2146044960.

The previous prime is 2221001207. The next prime is 2221001243. The reversal of 2221001231 is 1321001222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221001231 is a prime.

It is a super-2 number, since 2×2221001231² = 9865692936207030722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34616 + ... + 75101.

It is an arithmetic number, because the mean of its divisors is an integer number (287022288).

Almost surely, 2^2221001231 is an apocalyptic number.

2221001231 is a deficient number, since it is larger than the sum of its proper divisors (75177073).

2221001231 is a wasteful number, since it uses less digits than its factorization.

2221001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110401.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2221001231 is about 47127.4997321097. The cubic root of 2221001231 is about 1304.7168356522.

Adding to 2221001231 its reverse (1321001222), we get a palindrome (3542002453).

Subtracting from 2221001231 its reverse (1321001222), we obtain a palindrome (900000009).

The spelling of 2221001231 in words is "two billion, two hundred twenty-one million, one thousand, two hundred thirty-one".