20211111112100 has 72 divisors (see below), whose sum is σ = 44134703614848. Its totient is φ = 8033476579200.

The previous prime is 20211111112091. The next prime is 20211111112103. The reversal of 20211111112100 is 121111111202.

It is not an unprimeable number, because it can be changed into a prime (20211111112103) 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, 98300405 + ... + 98505795.

Almost surely, 2^{20211111112100} is an apocalyptic number.

20211111112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211111112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22067351807424).

20211111112100 is an abundant number, since it is smaller than the sum of its proper divisors (23923592502748).

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

20211111112100 is a wasteful number, since it uses less digits than its factorization.

20211111112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211605 (or 211598 counting only the distinct ones).

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

Adding to 20211111112100 its reverse (121111111202), we get a palindrome (20332222223302).

The spelling of 20211111112100 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, one hundred twelve thousand, one hundred".