23221130212 has 288 divisors, whose sum is σ = 55628052480. Its totient is φ = 8250439680.

The previous prime is 23221130209. The next prime is 23221130221. The reversal of 23221130212 is 21203112232.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 23221130212.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 327058137 + ... + 327058207.

It is an arithmetic number, because the mean of its divisors is an integer number (193152960).

Almost surely, 2^23221130212 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 23221130212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27814026240).

23221130212 is an abundant number, since it is smaller than the sum of its proper divisors (32406922268).

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

23221130212 is a wasteful number, since it uses less digits than its factorization.

23221130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23221130212 its reverse (21203112232), we get a palindrome (44424242444).

The spelling of 23221130212 in words is "twenty-three billion, two hundred twenty-one million, one hundred thirty thousand, two hundred twelve".