1232222121 has 12 divisors (see below), whose sum is σ = 1916790148. Its totient is φ = 758290464.

The previous prime is 1232222081. The next prime is 1232222149. The reversal of 1232222121 is 1212222321.

It can be written as a sum of positive squares in 2 ways, for example, as 751034025 + 481188096 = 27405^2 + 21936^2 .

It is not a de Polignac number, because 1232222121 - 2⁹ = 1232221609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1232222094 and 1232222103.

It is not an unprimeable number, because it can be changed into a prime (1232222221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5265790 + ... + 5266023.

Almost surely, 2^1232222121 is an apocalyptic number.

It is an amenable number.

1232222121 is a deficient number, since it is larger than the sum of its proper divisors (684568027).

1232222121 is a wasteful number, since it uses less digits than its factorization.

1232222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531832 (or 10531829 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1232222121 is about 35103.0215366142. The cubic root of 1232222121 is about 1072.0861043303.

Adding to 1232222121 its reverse (1212222321), we get a palindrome (2444444442).

It can be divided in two parts, 12322 and 22121, that added together give a palindrome (34443).

The spelling of 1232222121 in words is "one billion, two hundred thirty-two million, two hundred twenty-two thousand, one hundred twenty-one".