20111222112100 has 72 divisors (see below), whose sum is σ = 49886193329280. Its totient is φ = 6893843550720.

The previous prime is 20111222112097. The next prime is 20111222112101. The reversal of 20111222112100 is 121122211102.

It is a super-2 number, since 2×20111222112100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20111222112101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 389721 + ... + 6354079.

It is an arithmetic number, because the mean of its divisors is an integer number (692863796240).

Almost surely, 2^{20111222112100} is an apocalyptic number.

20111222112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111222112100 is an abundant number, since it is smaller than the sum of its proper divisors (29774971217180).

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

20111222112100 is a wasteful number, since it uses less digits than its factorization.

20111222112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969197 (or 5969190 counting only the distinct ones).

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

Adding to 20111222112100 its reverse (121122211102), we get a palindrome (20232344323202).

The spelling of 20111222112100 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred".