2121022112111 has 8 divisors (see below), whose sum is σ = 2429546972160. Its totient is φ = 1813877677368.

The previous prime is 2121022112093. The next prime is 2121022112119. The reversal of 2121022112111 is 1112112201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121022112111 - 2¹⁸ = 2121021849967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121022112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121022112119) 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 7 ways as a sum of consecutive naturals, for example, 345103031 + ... + 345109176.

It is an arithmetic number, because the mean of its divisors is an integer number (303693371520).

Almost surely, 2^{2121022112111} is an apocalyptic number.

2121022112111 is a deficient number, since it is larger than the sum of its proper divisors (308524860049).

2121022112111 is an equidigital number, since it uses as much as digits as its factorization.

2121022112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690212653.

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

Adding to 2121022112111 its reverse (1112112201212), we get a palindrome (3233134313323).

The spelling of 2121022112111 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred eleven".