2121200122111 has 16 divisors (see below), whose sum is σ = 2447910784000. Its totient is φ = 1800429635808.

The previous prime is 2121200122099. The next prime is 2121200122117. The reversal of 2121200122111 is 1112210021212.

It is a cyclic number.

It is not a de Polignac number, because 2121200122111 - 2¹¹ = 2121200120063 is a prime.

It is a super-2 number, since 2×2121200122111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200122117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478186 + ... + 2114488.

It is an arithmetic number, because the mean of its divisors is an integer number (152994424000).

Almost surely, 2^{2121200122111} is an apocalyptic number.

2121200122111 is a deficient number, since it is larger than the sum of its proper divisors (326710661889).

2121200122111 is a wasteful number, since it uses less digits than its factorization.

2121200122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638118.

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

Adding to 2121200122111 its reverse (1112210021212), we get a palindrome (3233410143323).

The spelling of 2121200122111 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred eleven".