23011213212 has 120 divisors (see below), whose sum is σ = 65121195216. Its totient is φ = 7043438592.

The previous prime is 23011213187. The next prime is 23011213289. The reversal of 23011213212 is 21231211032.

23011213212 is a `hidden beast` number, since 230 + 11 + 213 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 798763 + ... + 827069.

Almost surely, 2^23011213212 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 23011213212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32560597608).

23011213212 is an abundant number, since it is smaller than the sum of its proper divisors (42109982004).

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

23011213212 is a wasteful number, since it uses less digits than its factorization.

23011213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28529 (or 28518 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23011213212 its reverse (21231211032), we get a palindrome (44242424244).

The spelling of 23011213212 in words is "twenty-three billion, eleven million, two hundred thirteen thousand, two hundred twelve".