2231320212 has 72 divisors (see below), whose sum is σ = 6164881632. Its totient is φ = 674856000.

The previous prime is 2231320211. The next prime is 2231320213. The reversal of 2231320212 is 2120231322.

It is an interprime number because it is at equal distance from previous prime (2231320211) and next prime (2231320213).

It is a super-3 number, since 3×2231320212³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231320211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211462 + ... + 221762.

It is an arithmetic number, because the mean of its divisors is an integer number (85623356).

Almost surely, 2^2231320212 is an apocalyptic number.

2231320212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231320212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3082440816).

2231320212 is an abundant number, since it is smaller than the sum of its proper divisors (3933561420).

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

2231320212 is a wasteful number, since it uses less digits than its factorization.

2231320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10869 (or 10864 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2231320212 is about 47236.8522660010. The cubic root of 2231320212 is about 1306.7343268391.

Adding to 2231320212 its reverse (2120231322), we get a palindrome (4351551534).

The spelling of 2231320212 in words is "two billion, two hundred thirty-one million, three hundred twenty thousand, two hundred twelve".