2101112121210 has 64 divisors (see below), whose sum is σ = 5132924754048. Its totient is φ = 550346203904.

The previous prime is 2101112121179. The next prime is 2101112121217. The reversal of 2101112121210 is 121212111012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2101112121210.

It is not an unprimeable number, because it can be changed into a prime (2101112121217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2008017 + ... + 2869556.

It is an arithmetic number, because the mean of its divisors is an integer number (80201949282).

Almost surely, 2^{2101112121210} is an apocalyptic number.

2101112121210 is an abundant number, since it is smaller than the sum of its proper divisors (3031812632838).

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

2101112121210 is a wasteful number, since it uses less digits than its factorization.

2101112121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877839.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2101112121210 its reverse (121212111012), we get a palindrome (2222324232222).

The spelling of 2101112121210 in words is "two trillion, one hundred one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred ten".