2121122211213 has 4 divisors (see below), whose sum is σ = 2828162948288. Its totient is φ = 1414081474140.

The previous prime is 2121122211199. The next prime is 2121122211217. The reversal of 2121122211213 is 3121122211212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2121122211213 - 2²⁸ = 2120853775757 is a prime.

It is a super-2 number, since 2×2121122211213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121122211213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121122211217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353520368533 + ... + 353520368538.

It is an arithmetic number, because the mean of its divisors is an integer number (707040737072).

Almost surely, 2^{2121122211213} is an apocalyptic number.

It is an amenable number.

2121122211213 is a deficient number, since it is larger than the sum of its proper divisors (707040737075).

2121122211213 is an equidigital number, since it uses as much as digits as its factorization.

2121122211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707040737074.

The product of its digits is 192, while the sum is 21.

Adding to 2121122211213 its reverse (3121122211212), we get a palindrome (5242244422425).

Subtracting 2121122211213 from its reverse (3121122211212), we obtain a palindrome (999999999999).

The spelling of 2121122211213 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred thirteen".