20111122211200 has 96 divisors (see below), whose sum is σ = 51393886362000. Its totient is φ = 7767054059520.

The previous prime is 20111122211161. The next prime is 20111122211207. The reversal of 20111122211200 is 211222111102.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111122211207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108264540 + ... + 108450139.

Almost surely, 2^{20111122211200} is an apocalyptic number.

20111122211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111122211200 is an abundant number, since it is smaller than the sum of its proper divisors (31282764150800).

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

20111122211200 is a wasteful number, since it uses less digits than its factorization.

20111122211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216714732 (or 216714715 counting only the distinct ones).

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

Adding to 20111122211200 its reverse (211222111102), we get a palindrome (20322344322302).

The spelling of 20111122211200 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, two hundred eleven thousand, two hundred".