2121200011 has 8 divisors (see below), whose sum is σ = 2439102464. Its totient is φ = 1807016040.

The previous prime is 2121199999. The next prime is 2121200021. The reversal of 2121200011 is 1100021212.

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 2121200011 - 2⁵ = 2121199979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121200021) 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, 928395 + ... + 930676.

It is an arithmetic number, because the mean of its divisors is an integer number (304887808).

Almost surely, 2^2121200011 is an apocalyptic number.

2121200011 is a deficient number, since it is larger than the sum of its proper divisors (317902453).

2121200011 is a wasteful number, since it uses less digits than its factorization.

2121200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859241.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2121200011 is about 46056.4871760754. The cubic root of 2121200011 is about 1284.8739975468.

Adding to 2121200011 its reverse (1100021212), we get a palindrome (3221221223).

The spelling of 2121200011 in words is "two billion, one hundred twenty-one million, two hundred thousand, eleven".