20123121332 has 12 divisors (see below), whose sum is σ = 35279845440. Its totient is φ = 10043165496.

The previous prime is 20123121329. The next prime is 20123121371. The reversal of 20123121332 is 23312132102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4596332 + ... + 4600707.

It is an arithmetic number, because the mean of its divisors is an integer number (2939987120).

Almost surely, 2^20123121332 is an apocalyptic number.

It is an amenable number.

20123121332 is a deficient number, since it is larger than the sum of its proper divisors (15156724108).

20123121332 is a wasteful number, since it uses less digits than its factorization.

20123121332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9197590 (or 9197588 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20123121332 its reverse (23312132102), we get a palindrome (43435253434).

The spelling of 20123121332 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-two".