2102221201111 has 4 divisors (see below), whose sum is σ = 2102224145400. Its totient is φ = 2102218256824.

The previous prime is 2102221201099. The next prime is 2102221201139. The reversal of 2102221201111 is 1111021222012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2102221201111 - 2¹¹ = 2102221199063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102221201151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353685 + ... + 2080753.

It is an arithmetic number, because the mean of its divisors is an integer number (525556036350).

Almost surely, 2^{2102221201111} is an apocalyptic number.

2102221201111 is a deficient number, since it is larger than the sum of its proper divisors (2944289).

2102221201111 is a wasteful number, since it uses less digits than its factorization.

2102221201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944288.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2102221201111 its reverse (1111021222012), we get a palindrome (3213242423123).

The spelling of 2102221201111 in words is "two trillion, one hundred two billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".