2100111212220 has 192 divisors, whose sum is σ = 7425048508416. Its totient is φ = 432145612800.

The previous prime is 2100111212201. The next prime is 2100111212231. The reversal of 2100111212220 is 222121110012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2100111212220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6229981 + ... + 6558420.

It is an arithmetic number, because the mean of its divisors is an integer number (38672127648).

Almost surely, 2^{2100111212220} is an apocalyptic number.

2100111212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100111212220 is an abundant number, since it is smaller than the sum of its proper divisors (5324937296196).

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

2100111212220 is a wasteful number, since it uses less digits than its factorization.

2100111212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12788460 (or 12788458 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2100111212220 its reverse (222121110012), we get a palindrome (2322232322232).

The spelling of 2100111212220 in words is "two trillion, one hundred billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty".