20123120012 has 24 divisors (see below), whose sum is σ = 35782429872. Its totient is φ = 9900792000.

The previous prime is 20123120009. The next prime is 20123120041. The reversal of 20123120012 is 21002132102.

It is a happy number.

It is an unprimeable number.

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, 86939 + ... + 218642.

It is an arithmetic number, because the mean of its divisors is an integer number (1490934578).

Almost surely, 2^20123120012 is an apocalyptic number.

It is an amenable number.

20123120012 is a deficient number, since it is larger than the sum of its proper divisors (15659309860).

20123120012 is a wasteful number, since it uses less digits than its factorization.

20123120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305849 (or 305847 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20123120012 its reverse (21002132102), we get a palindrome (41125252114).

The spelling of 20123120012 in words is "twenty billion, one hundred twenty-three million, one hundred twenty thousand, twelve".