2121021100011 has 16 divisors (see below), whose sum is σ = 3115667363328. Its totient is φ = 1272739932000.

The previous prime is 2121021099931. The next prime is 2121021100043. The reversal of 2121021100011 is 1100011201212.

It is not a de Polignac number, because 2121021100011 - 2¹⁸ = 2121020837867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121021100011.

It is not an unprimeable number, because it can be changed into a prime (2121021100061) 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, 318181651 + ... + 318188316.

It is an arithmetic number, because the mean of its divisors is an integer number (194729210208).

Almost surely, 2^{2121021100011} is an apocalyptic number.

2121021100011 is a deficient number, since it is larger than the sum of its proper divisors (994646263317).

2121021100011 is a wasteful number, since it uses less digits than its factorization.

2121021100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636370082.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2121021100011 its reverse (1100011201212), we get a palindrome (3221032301223).

The spelling of 2121021100011 in words is "two trillion, one hundred twenty-one billion, twenty-one million, one hundred thousand, eleven".