3211231121 has 6 divisors (see below), whose sum is σ = 3735513810. Its totient is φ = 2752483776.

The previous prime is 3211231109. The next prime is 3211231129. The reversal of 3211231121 is 1211321123.

It can be written as a sum of positive squares in only one way, i.e., 2119589521 + 1091641600 = 46039^2 + 33040^2 .

It is not a de Polignac number, because 3211231121 - 2²² = 3207036817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3211231121.

It is not an unprimeable number, because it can be changed into a prime (3211231129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32767616 + ... + 32767713.

It is an arithmetic number, because the mean of its divisors is an integer number (622585635).

Almost surely, 2^3211231121 is an apocalyptic number.

It is an amenable number.

3211231121 is a deficient number, since it is larger than the sum of its proper divisors (524282689).

3211231121 is an equidigital number, since it uses as much as digits as its factorization.

3211231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65535343 (or 65535336 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 3211231121 is about 56667.7255675574. The cubic root of 3211231121 is about 1475.3345782808.

Adding to 3211231121 its reverse (1211321123), we get a palindrome (4422552244).

The spelling of 3211231121 in words is "three billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twenty-one".