20111211202012 has 48 divisors (see below), whose sum is σ = 43325133852672. Its totient is φ = 7978400749440.

The previous prime is 20111211201997. The next prime is 20111211202097. The reversal of 20111211202012 is 21020211211102.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 503666953 + ... + 503706880.

It is an arithmetic number, because the mean of its divisors is an integer number (902606955264).

Almost surely, 2^{20111211202012} is an apocalyptic number.

It is an amenable number.

20111211202012 is an abundant number, since it is smaller than the sum of its proper divisors (23213922650660).

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

20111211202012 is a wasteful number, since it uses less digits than its factorization.

20111211202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007373898 (or 1007373896 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111211202012 its reverse (21020211211102), we get a palindrome (41131422413114).

The spelling of 20111211202012 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, two hundred two thousand, twelve".