20111211220100 has 144 divisors (see below), whose sum is σ = 58595350240896. Its totient is φ = 5786242560000.

The previous prime is 20111211220073. The next prime is 20111211220123. The reversal of 20111211220100 is 102211211102.

It is a super-2 number, since 2×20111211220100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100355501 + ... + 100555700.

Almost surely, 2^{20111211220100} is an apocalyptic number.

20111211220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111211220100 is an abundant number, since it is smaller than the sum of its proper divisors (38484139020796).

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

20111211220100 is a wasteful number, since it uses less digits than its factorization.

20111211220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200911246 (or 200911239 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20111211220100 its reverse (102211211102), we get a palindrome (20213422431202).

The spelling of 20111211220100 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred".