2231211121 has 8 divisors (see below), whose sum is σ = 2362913640. Its totient is φ = 2099559168.

The previous prime is 2231211023. The next prime is 2231211127. The reversal of 2231211121 is 1211121322.

2231211121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1361610000 + 869601121 = 36900^2 + 29489^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2231211121 - 2²¹ = 2229113969 is a prime.

It is a super-3 number, since 3×2231211121³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2231211095 and 2231211104.

It is not an unprimeable number, because it can be changed into a prime (2231211127) 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, 115275 + ... + 133231.

It is an arithmetic number, because the mean of its divisors is an integer number (295364205).

Almost surely, 2^2231211121 is an apocalyptic number.

It is an amenable number.

2231211121 is a deficient number, since it is larger than the sum of its proper divisors (131702519).

2231211121 is a wasteful number, since it uses less digits than its factorization.

2231211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25283.

The product of its digits is 48, while the sum is 16.

The square root of 2231211121 is about 47235.6975284583. The cubic root of 2231211121 is about 1306.7130307358.

Adding to 2231211121 its reverse (1211121322), we get a palindrome (3442332443).

It can be divided in two parts, 22312 and 11121, that added together give a palindrome (33433).

The spelling of 2231211121 in words is "two billion, two hundred thirty-one million, two hundred eleven thousand, one hundred twenty-one".