2121200000111 has 8 divisors (see below), whose sum is σ = 2233649114880. Its totient is φ = 2008831586328.

The previous prime is 2121200000107. The next prime is 2121200000119. The reversal of 2121200000111 is 1110000021212.

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 2121200000111 - 2² = 2121200000107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121200000092 and 2121200000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200000119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20121281 + ... + 20226426.

It is an arithmetic number, because the mean of its divisors is an integer number (279206139360).

Almost surely, 2^{2121200000111} is an apocalyptic number.

2121200000111 is a deficient number, since it is larger than the sum of its proper divisors (112449114769).

2121200000111 is a wasteful number, since it uses less digits than its factorization.

2121200000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40350493.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2121200000111 its reverse (1110000021212), we get a palindrome (3231200021323).

The spelling of 2121200000111 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred eleven", and thus it is an aban number.