2101220110210 has 48 divisors (see below), whose sum is σ = 4116304291176. Its totient is φ = 771896745984.

The previous prime is 2101220110097. The next prime is 2101220110211. The reversal of 2101220110210 is 120110221012.

It can be written as a sum of positive squares in 12 ways, for example, as 4391580361 + 2096828529849 = 66269^2 + 1448043^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (2101220110211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2822719 + ... + 3488578.

Almost surely, 2^{2101220110210} is an apocalyptic number.

2101220110210 is a deficient number, since it is larger than the sum of its proper divisors (2015084180966).

2101220110210 is a wasteful number, since it uses less digits than its factorization.

2101220110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311527 (or 6311514 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101220110210 its reverse (120110221012), we get a palindrome (2221330331222).

The spelling of 2101220110210 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred ten thousand, two hundred ten".