213022231312 has 60 divisors (see below), whose sum is σ = 470679030864. Its totient is φ = 92618320960.

The previous prime is 213022231267. The next prime is 213022231319. The reversal of 213022231312 is 213132220312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (213022231319) 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, 1050898 + ... + 1237105.

Almost surely, 2^213022231312 is an apocalyptic number.

213022231312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213022231312 is an abundant number, since it is smaller than the sum of its proper divisors (257656799552).

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

213022231312 is a wasteful number, since it uses less digits than its factorization.

213022231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288068 (or 2288039 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 213022231312 its reverse (213132220312), we get a palindrome (426154451624).

The spelling of 213022231312 in words is "two hundred thirteen billion, twenty-two million, two hundred thirty-one thousand, three hundred twelve".