2211111020100 has 144 divisors (see below), whose sum is σ = 6583783985856. Its totient is φ = 572523840000.

The previous prime is 2211111020099. The next prime is 2211111020113. The reversal of 2211111020100 is 10201111122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5247250 + ... + 5652950.

It is an arithmetic number, because the mean of its divisors is an integer number (45720722124).

Almost surely, 2^{2211111020100} is an apocalyptic number.

2211111020100 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 2211111020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291891992928).

2211111020100 is an abundant number, since it is smaller than the sum of its proper divisors (4372672965756).

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

2211111020100 is a wasteful number, since it uses less digits than its factorization.

2211111020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406246 (or 406239 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2211111020100 its reverse (10201111122), we get a palindrome (2221312131222).

The spelling of 2211111020100 in words is "two trillion, two hundred eleven billion, one hundred eleven million, twenty thousand, one hundred".