213122232232 has 128 divisors (see below), whose sum is σ = 521306634240. Its totient is φ = 79267921920.

The previous prime is 213122232223. The next prime is 213122232287. The reversal of 213122232232 is 232232221312.

It is a junction number, because it is equal to n+sod(n) for n = 213122232197 and 213122232206.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12255928 + ... + 12273304.

It is an arithmetic number, because the mean of its divisors is an integer number (4072708080).

Almost surely, 2^213122232232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213122232232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260653317120).

213122232232 is an abundant number, since it is smaller than the sum of its proper divisors (308184402008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213122232232 is a wasteful number, since it uses less digits than its factorization.

213122232232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18411 (or 18407 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

Adding to 213122232232 its reverse (232232221312), we get a palindrome (445354453544).

The spelling of 213122232232 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred thirty-two thousand, two hundred thirty-two".