2121110111213 has 16 divisors (see below), whose sum is σ = 2147980038144. Its totient is φ = 2094420343680.

The previous prime is 2121110111201. The next prime is 2121110111243. The reversal of 2121110111213 is 3121110111212.

It is a cyclic number.

It is not a de Polignac number, because 2121110111213 - 2⁸ = 2121110110957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121110111191 and 2121110111200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121110111243) 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, 25361681 + ... + 25445177.

It is an arithmetic number, because the mean of its divisors is an integer number (134248752384).

Almost surely, 2^{2121110111213} is an apocalyptic number.

It is an amenable number.

2121110111213 is a deficient number, since it is larger than the sum of its proper divisors (26869926931).

2121110111213 is a wasteful number, since it uses less digits than its factorization.

2121110111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84572.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 2121110111213 its reverse (3121110111212), we get a palindrome (5242220222425).

Subtracting 2121110111213 from its reverse (3121110111212), we obtain a palindrome (999999999999).

The spelling of 2121110111213 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, two hundred thirteen".