20121343252 has 24 divisors (see below), whose sum is σ = 35747531456. Its totient is φ = 9907843968.

The previous prime is 20121343243. The next prime is 20121343343. The reversal of 20121343252 is 25234312102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306348 + ... + 1321660.

Almost surely, 2^20121343252 is an apocalyptic number.

It is an amenable number.

20121343252 is a deficient number, since it is larger than the sum of its proper divisors (15626188204).

20121343252 is a wasteful number, since it uses less digits than its factorization.

20121343252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20287 (or 20285 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20121343252 its reverse (25234312102), we get a palindrome (45355655354).

The spelling of 20121343252 in words is "twenty billion, one hundred twenty-one million, three hundred forty-three thousand, two hundred fifty-two".