12213012020 has 48 divisors (see below), whose sum is σ = 28039048128. Its totient is φ = 4431548160.

The previous prime is 12213011953. The next prime is 12213012067. The reversal of 12213012020 is 2021031221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12213011986 and 12213012004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43304 + ... + 162176.

It is an arithmetic number, because the mean of its divisors is an integer number (584146836).

Almost surely, 2^12213012020 is an apocalyptic number.

12213012020 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 12213012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14019524064).

12213012020 is an abundant number, since it is smaller than the sum of its proper divisors (15826036108).

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

12213012020 is a wasteful number, since it uses less digits than its factorization.

12213012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119360 (or 119358 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12213012020 its reverse (2021031221), we get a palindrome (14234043241).

The spelling of 12213012020 in words is "twelve billion, two hundred thirteen million, twelve thousand, twenty".