2101223610 has 24 divisors (see below), whose sum is σ = 5463181620. Its totient is φ = 560326272.

The previous prime is 2101223563. The next prime is 2101223611. The reversal of 2101223610 is 163221012.

2101223610 is a `hidden beast` number, since 21 + 0 + 12 + 23 + 610 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1696368969 + 404854641 = 41187^2 + 20121^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2101223611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11673375 + ... + 11673554.

Almost surely, 2^2101223610 is an apocalyptic number.

2101223610 is an abundant number, since it is smaller than the sum of its proper divisors (3361958010).

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

2101223610 is a wasteful number, since it uses less digits than its factorization.

2101223610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23346942 (or 23346939 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2101223610 is about 45839.1056849935. The cubic root of 2101223610 is about 1280.8278356598.

Adding to 2101223610 its reverse (163221012), we get a palindrome (2264444622).

The spelling of 2101223610 in words is "two billion, one hundred one million, two hundred twenty-three thousand, six hundred ten".