20121233120 has 24 divisors (see below), whose sum is σ = 47536413624. Its totient is φ = 8048493184.

The previous prime is 20121233101. The next prime is 20121233137. The reversal of 20121233120 is 2133212102.

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 3 ways as a sum of consecutive naturals, for example, 62878694 + ... + 62879013.

It is an arithmetic number, because the mean of its divisors is an integer number (1980683901).

Almost surely, 2^20121233120 is an apocalyptic number.

20121233120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121233120 is an abundant number, since it is smaller than the sum of its proper divisors (27415180504).

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

20121233120 is a wasteful number, since it uses less digits than its factorization.

20121233120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125757722 (or 125757714 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20121233120 its reverse (2133212102), we get a palindrome (22254445222).

The spelling of 20121233120 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred twenty".