2231322121 has 16 divisors (see below), whose sum is σ = 2596654080. Its totient is φ = 1877717520.

The previous prime is 2231322109. The next prime is 2231322127. The reversal of 2231322121 is 1212231322.

It is not a de Polignac number, because 2231322121 - 2¹⁷ = 2231191049 is a prime.

It is a super-3 number, since 3×2231322121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231322127) 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, 363286 + ... + 369376.

It is an arithmetic number, because the mean of its divisors is an integer number (162290880).

Almost surely, 2^2231322121 is an apocalyptic number.

It is an amenable number.

2231322121 is a deficient number, since it is larger than the sum of its proper divisors (365331959).

2231322121 is an equidigital number, since it uses as much as digits as its factorization.

2231322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044.

The product of its digits is 288, while the sum is 19.

The square root of 2231322121 is about 47236.8724726775. The cubic root of 2231322121 is about 1306.7346994967.

Adding to 2231322121 its reverse (1212231322), we get a palindrome (3443553443).

It can be divided in two parts, 2231322 and 121, that multiplied together give a palindrome (269989962).

The spelling of 2231322121 in words is "two billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred twenty-one".