20121311224 has 32 divisors (see below), whose sum is σ = 43121710080. Its totient is φ = 8622496224.

The previous prime is 20121311219. The next prime is 20121311233. The reversal of 20121311224 is 42211312102.

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, 885169 + ... + 907615.

It is an arithmetic number, because the mean of its divisors is an integer number (1347553440).

Almost surely, 2^20121311224 is an apocalyptic number.

It is an amenable number.

20121311224 is an abundant number, since it is smaller than the sum of its proper divisors (23000398856).

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

20121311224 is a wasteful number, since it uses less digits than its factorization.

20121311224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38467 (or 38463 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20121311224 its reverse (42211312102), we get a palindrome (62332623326).

The spelling of 20121311224 in words is "twenty billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty-four".