2102102011211 has 4 divisors (see below), whose sum is σ = 2225755070712. Its totient is φ = 1978448951712.

The previous prime is 2102102011199. The next prime is 2102102011397. The reversal of 2102102011211 is 1121102012012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102102011211 - 2⁶ = 2102102011147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102102011811) 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 3 ways as a sum of consecutive naturals, for example, 61826529725 + ... + 61826529758.

It is an arithmetic number, because the mean of its divisors is an integer number (556438767678).

Almost surely, 2^{2102102011211} is an apocalyptic number.

2102102011211 is a deficient number, since it is larger than the sum of its proper divisors (123653059501).

2102102011211 is a wasteful number, since it uses less digits than its factorization.

2102102011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123653059500.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2102102011211 its reverse (1121102012012), we get a palindrome (3223204023223).

The spelling of 2102102011211 in words is "two trillion, one hundred two billion, one hundred two million, eleven thousand, two hundred eleven".