2101122210 has 128 divisors (see below), whose sum is σ = 5726972160. Its totient is φ = 488678400.

The previous prime is 2101122187. The next prime is 2101122217. The reversal of 2101122210 is 122211012.

2101122210 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2101122217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1731564 + ... + 1732776.

It is an arithmetic number, because the mean of its divisors is an integer number (44741970).

Almost surely, 2^2101122210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2863486080).

2101122210 is an abundant number, since it is smaller than the sum of its proper divisors (3625849950).

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

2101122210 is a wasteful number, since it uses less digits than its factorization.

2101122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

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

The square root of 2101122210 is about 45837.9996291287. Note that the first 3 decimals coincide. The cubic root of 2101122210 is about 1280.8072321043.

Adding to 2101122210 its reverse (122211012), we get a palindrome (2223333222).

The spelling of 2101122210 in words is "two billion, one hundred one million, one hundred twenty-two thousand, two hundred ten".