13231212122 has 4 divisors (see below), whose sum is σ = 19846818186. Its totient is φ = 6615606060.

The previous prime is 13231212119. The next prime is 13231212133. The reversal of 13231212122 is 22121213231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10974867121 + 2256345001 = 104761^2 + 47501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13231212094 and 13231212103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307803029 + ... + 3307803032.

Almost surely, 2^13231212122 is an apocalyptic number.

13231212122 is a deficient number, since it is larger than the sum of its proper divisors (6615606064).

13231212122 is an equidigital number, since it uses as much as digits as its factorization.

13231212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615606063.

The product of its digits is 288, while the sum is 20.

Adding to 13231212122 its reverse (22121213231), we get a palindrome (35352425353).

The spelling of 13231212122 in words is "thirteen billion, two hundred thirty-one million, two hundred twelve thousand, one hundred twenty-two".