2111210220 has 96 divisors (see below), whose sum is σ = 6841497600. Its totient is φ = 476446464.

The previous prime is 2111210177. The next prime is 2111210239. The reversal of 2111210220 is 220121112.

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 = 2111210196 and 2111210205.

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, 1366 + ... + 64994.

It is an arithmetic number, because the mean of its divisors is an integer number (71265600).

Almost surely, 2^2111210220 is an apocalyptic number.

2111210220 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 2111210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3420748800).

2111210220 is an abundant number, since it is smaller than the sum of its proper divisors (4730287380).

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

2111210220 is a wasteful number, since it uses less digits than its factorization.

2111210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63727 (or 63725 counting only the distinct ones).

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

The square root of 2111210220 is about 45947.9076781522. The cubic root of 2111210220 is about 1282.8537848836.

Adding to 2111210220 its reverse (220121112), we get a palindrome (2331331332).

The spelling of 2111210220 in words is "two billion, one hundred eleven million, two hundred ten thousand, two hundred twenty".