2231020221 has 8 divisors (see below), whose sum is σ = 2977142784. Its totient is φ = 1486122240.

The previous prime is 2231020201. The next prime is 2231020249. The reversal of 2231020221 is 1220201322.

It is a happy number.

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

It is not a de Polignac number, because 2231020221 - 2⁵ = 2231020189 is a prime.

It is a super-3 number, since 3×2231020221³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231020201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301885 + ... + 309186.

It is an arithmetic number, because the mean of its divisors is an integer number (372142848).

Almost surely, 2^2231020221 is an apocalyptic number.

It is an amenable number.

2231020221 is a deficient number, since it is larger than the sum of its proper divisors (746122563).

2231020221 is a wasteful number, since it uses less digits than its factorization.

2231020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612291.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2231020221 is about 47233.6767677470. The cubic root of 2231020221 is about 1306.6757626903.

Adding to 2231020221 its reverse (1220201322), we get a palindrome (3451221543).

The spelling of 2231020221 in words is "two billion, two hundred thirty-one million, twenty thousand, two hundred twenty-one".