12213022420 has 24 divisors (see below), whose sum is σ = 26082050400. Its totient is φ = 4802408352.

The previous prime is 12213022363. The next prime is 12213022441. The reversal of 12213022420 is 2422031221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5173830 + ... + 5176189.

It is an arithmetic number, because the mean of its divisors is an integer number (1086752100).

Almost surely, 2^12213022420 is an apocalyptic number.

12213022420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213022420 is an abundant number, since it is smaller than the sum of its proper divisors (13869027980).

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

12213022420 is a wasteful number, since it uses less digits than its factorization.

12213022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350087 (or 10350085 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12213022420 its reverse (2422031221), we get a palindrome (14635053641).

The spelling of 12213022420 in words is "twelve billion, two hundred thirteen million, twenty-two thousand, four hundred twenty".