20121142224 has 40 divisors (see below), whose sum is σ = 53656383232. Its totient is φ = 6490690560.

The previous prime is 20121142207. The next prime is 20121142271. The reversal of 20121142224 is 42224112102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121142224.

It is a congruent number.

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, 6759649 + ... + 6762624.

Almost surely, 2^20121142224 is an apocalyptic number.

20121142224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20121142224 is an abundant number, since it is smaller than the sum of its proper divisors (33535241008).

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

20121142224 is a wasteful number, since it uses less digits than its factorization.

20121142224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13522315 (or 13522309 counting only the distinct ones).

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

Adding to 20121142224 its reverse (42224112102), we get a palindrome (62345254326).

The spelling of 20121142224 in words is "twenty billion, one hundred twenty-one million, one hundred forty-two thousand, two hundred twenty-four".