2121343221013 has 8 divisors (see below), whose sum is σ = 2133326916000. Its totient is φ = 2109360999888.

The previous prime is 2121343220959. The next prime is 2121343221037. The reversal of 2121343221013 is 3101223431212.

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 2121343221013 - 2²¹ = 2121341123861 is a prime.

It is a super-2 number, since 2×2121343221013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121343221043) 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, 2584938 + ... + 3305236.

It is an arithmetic number, because the mean of its divisors is an integer number (266665864500).

Almost surely, 2^{2121343221013} is an apocalyptic number.

It is an amenable number.

2121343221013 is a deficient number, since it is larger than the sum of its proper divisors (11983694987).

2121343221013 is a wasteful number, since it uses less digits than its factorization.

2121343221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736931.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 2121343221013 its reverse (3101223431212), we get a palindrome (5222566652225).

The spelling of 2121343221013 in words is "two trillion, one hundred twenty-one billion, three hundred forty-three million, two hundred twenty-one thousand, thirteen".