2121221222213 has 8 divisors (see below), whose sum is σ = 2172207772800. Its totient is φ = 2070838063008.

The previous prime is 2121221222129. The next prime is 2121221222233. The reversal of 2121221222213 is 3122221221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121221222213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121221222233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150840731 + ... + 150854792.

It is an arithmetic number, because the mean of its divisors is an integer number (271525971600).

Almost surely, 2^{2121221222213} is an apocalyptic number.

It is an amenable number.

2121221222213 is a deficient number, since it is larger than the sum of its proper divisors (50986550587).

2121221222213 is an equidigital number, since it uses as much as digits as its factorization.

2121221222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301695691.

The product of its digits is 768, while the sum is 23.

Adding to 2121221222213 its reverse (3122221221212), we get a palindrome (5243442443425).

The spelling of 2121221222213 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred thirteen".