20112121111012 has 24 divisors (see below), whose sum is σ = 40329266374656. Its totient is φ = 8596975300608.

The previous prime is 20112121110997. The next prime is 20112121111037. The reversal of 20112121111012 is 21011112121102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937704733 + ... + 937726180.

It is an arithmetic number, because the mean of its divisors is an integer number (1680386098944).

Almost surely, 2^{20112121111012} is an apocalyptic number.

It is an amenable number.

20112121111012 is an abundant number, since it is smaller than the sum of its proper divisors (20217145263644).

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

20112121111012 is a wasteful number, since it uses less digits than its factorization.

20112121111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875431307 (or 1875431305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 20112121111012 its reverse (21011112121102), we get a palindrome (41123233232114).

The spelling of 20112121111012 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, twelve".