2102122021111 has 4 divisors (see below), whose sum is σ = 2402425166992. Its totient is φ = 1801818875232.

The previous prime is 2102122021081. The next prime is 2102122021159. The reversal of 2102122021111 is 1111202212012.

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 2102122021111 - 2¹³ = 2102122012919 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 (2102122021711) 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, 150151572930 + ... + 150151572943.

It is an arithmetic number, because the mean of its divisors is an integer number (600606291748).

Almost surely, 2^{2102122021111} is an apocalyptic number.

2102122021111 is a deficient number, since it is larger than the sum of its proper divisors (300303145881).

2102122021111 is an equidigital number, since it uses as much as digits as its factorization.

2102122021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300303145880.

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

Adding to 2102122021111 its reverse (1111202212012), we get a palindrome (3213324233123).

The spelling of 2102122021111 in words is "two trillion, one hundred two billion, one hundred twenty-two million, twenty-one thousand, one hundred eleven".