2102200111221 has 16 divisors (see below), whose sum is σ = 3251163784704. Its totient is φ = 1183327993584.

The previous prime is 2102200111217. The next prime is 2102200111237. The reversal of 2102200111221 is 1221110022012.

It is not a de Polignac number, because 2102200111221 - 2² = 2102200111217 is a prime.

It is a super-2 number, since 2×2102200111221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102200111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102200111201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747049095 + ... + 747051908.

It is an arithmetic number, because the mean of its divisors is an integer number (203197736544).

Almost surely, 2^{2102200111221} is an apocalyptic number.

2102200111221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2102200111221 is a deficient number, since it is larger than the sum of its proper divisors (1148963673483).

2102200111221 is a wasteful number, since it uses less digits than its factorization.

2102200111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494101080.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2102200111221 its reverse (1221110022012), we get a palindrome (3323310133233).

The spelling of 2102200111221 in words is "two trillion, one hundred two billion, two hundred million, one hundred eleven thousand, two hundred twenty-one".