2100110021220 has 96 divisors (see below), whose sum is σ = 6247646899200. Its totient is φ = 525595630464.

The previous prime is 2100110021213. The next prime is 2100110021249. The reversal of 2100110021220 is 221200110012.

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

It is a junction number, because it is equal to n+sod(n) for n = 2100110021196 and 2100110021205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8486440 + ... + 8730399.

It is an arithmetic number, because the mean of its divisors is an integer number (65079655200).

Almost surely, 2^{2100110021220} is an apocalyptic number.

2100110021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100110021220 is an abundant number, since it is smaller than the sum of its proper divisors (4147536877980).

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

2100110021220 is a wasteful number, since it uses less digits than its factorization.

2100110021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17216977 (or 17216975 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2100110021220 its reverse (221200110012), we get a palindrome (2321310131232).

The spelling of 2100110021220 in words is "two trillion, one hundred billion, one hundred ten million, twenty-one thousand, two hundred twenty".