2122121210111 has 4 divisors (see below), whose sum is σ = 2425281382992. Its totient is φ = 1818961037232.

The previous prime is 2122121210093. The next prime is 2122121210129. The reversal of 2122121210111 is 1110121212212.

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

It is an interprime number because it is at equal distance from previous prime (2122121210093) and next prime (2122121210129).

It is a cyclic number.

It is not a de Polignac number, because 2122121210111 - 2⁶ = 2122121210047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122121210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122121210411) 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, 151580086430 + ... + 151580086443.

It is an arithmetic number, because the mean of its divisors is an integer number (606320345748).

Almost surely, 2^{2122121210111} is an apocalyptic number.

2122121210111 is a deficient number, since it is larger than the sum of its proper divisors (303160172881).

2122121210111 is an equidigital number, since it uses as much as digits as its factorization.

2122121210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303160172880.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2122121210111 its reverse (1110121212212), we get a palindrome (3232242422323).

The spelling of 2122121210111 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, one hundred eleven".