12021441420 has 24 divisors (see below), whose sum is σ = 33660036144. Its totient is φ = 3205717696.

The previous prime is 12021441409. The next prime is 12021441529. The reversal of 12021441420 is 2414412021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100178619 + ... + 100178738.

It is an arithmetic number, because the mean of its divisors is an integer number (1402501506).

Almost surely, 2^12021441420 is an apocalyptic number.

12021441420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021441420 is an abundant number, since it is smaller than the sum of its proper divisors (21638594724).

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

12021441420 is a wasteful number, since it uses less digits than its factorization.

12021441420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200357369 (or 200357367 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12021441420 its reverse (2414412021), we get a palindrome (14435853441).

The spelling of 12021441420 in words is "twelve billion, twenty-one million, four hundred forty-one thousand, four hundred twenty".