20121205233 has 8 divisors (see below), whose sum is σ = 26835851488. Its totient is φ = 13410347904.

The previous prime is 20121205163. The next prime is 20121205241. The reversal of 20121205233 is 33250212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121205233 - 2⁹ = 20121204721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121205033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934816 + ... + 956097.

It is an arithmetic number, because the mean of its divisors is an integer number (3354481436).

Almost surely, 2^20121205233 is an apocalyptic number.

It is an amenable number.

20121205233 is a deficient number, since it is larger than the sum of its proper divisors (6714646255).

20121205233 is a wasteful number, since it uses less digits than its factorization.

20121205233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894463.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20121205233 its reverse (33250212102), we get a palindrome (53371417335).

The spelling of 20121205233 in words is "twenty billion, one hundred twenty-one million, two hundred five thousand, two hundred thirty-three".