12123213000 has 128 divisors (see below), whose sum is σ = 37936080000. Its totient is φ = 3223315200.

The previous prime is 12123212993. The next prime is 12123213007. The reversal of 12123213000 is 31232121.

It is an interprime number because it is at equal distance from previous prime (12123212993) and next prime (12123213007).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12123213007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041211 + ... + 1052789.

It is an arithmetic number, because the mean of its divisors is an integer number (296375625).

Almost surely, 2^12123213000 is an apocalyptic number.

12123213000 is a gapful number since it is divisible by the number (10) 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 12123213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18968040000).

12123213000 is an abundant number, since it is smaller than the sum of its proper divisors (25812867000).

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

12123213000 is a wasteful number, since it uses less digits than its factorization.

12123213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11952 (or 11938 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12123213000 its reverse (31232121), we get a palindrome (12154445121).

The spelling of 12123213000 in words is "twelve billion, one hundred twenty-three million, two hundred thirteen thousand".