23031213012 has 144 divisors (see below), whose sum is σ = 62553254400. Its totient is φ = 7119436800.

The previous prime is 23031212999. The next prime is 23031213019. The reversal of 23031213012 is 21031213032.

It is a super-2 number, since 2×23031213012² (a number of 22 digits) contains 22 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 (23031213019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14772289 + ... + 14773847.

It is an arithmetic number, because the mean of its divisors is an integer number (434397600).

Almost surely, 2^23031213012 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 23031213012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31276627200).

23031213012 is an abundant number, since it is smaller than the sum of its proper divisors (39522041388).

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

23031213012 is a wasteful number, since it uses less digits than its factorization.

23031213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926 (or 1921 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23031213012 its reverse (21031213032), we get a palindrome (44062426044).

The spelling of 23031213012 in words is "twenty-three billion, thirty-one million, two hundred thirteen thousand, twelve".