12121233020 has 96 divisors (see below), whose sum is σ = 28113136128. Its totient is φ = 4361640192.

The previous prime is 12121233011. The next prime is 12121233031. The reversal of 12121233020 is 2033212121.

It is a self number, because there is not a number n which added to its sum of digits gives 12121233020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6561737 + ... + 6563583.

It is an arithmetic number, because the mean of its divisors is an integer number (292845168).

Almost surely, 2^12121233020 is an apocalyptic number.

12121233020 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 12121233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14056568064).

12121233020 is an abundant number, since it is smaller than the sum of its proper divisors (15991903108).

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

12121233020 is a wasteful number, since it uses less digits than its factorization.

12121233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12121233020 its reverse (2033212121), we get a palindrome (14154445141).

The spelling of 12121233020 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-three thousand, twenty".