20111100111212 has 12 divisors (see below), whose sum is σ = 38393918394216. Its totient is φ = 9141409141440.

The previous prime is 20111100111197. The next prime is 20111100111259. The reversal of 20111100111212 is 21211100111102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228535228493 + ... + 228535228580.

It is an arithmetic number, because the mean of its divisors is an integer number (3199493199518).

Almost surely, 2^{20111100111212} is an apocalyptic number.

20111100111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20111100111212 is a deficient number, since it is larger than the sum of its proper divisors (18282818283004).

20111100111212 is a wasteful number, since it uses less digits than its factorization.

20111100111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457070457088 (or 457070457086 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20111100111212 its reverse (21211100111102), we get a palindrome (41322200222314).

The spelling of 20111100111212 in words is "twenty trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, two hundred twelve".