2121214342621 has 16 divisors (see below), whose sum is σ = 2333780003520. Its totient is φ = 1911973351680.

The previous prime is 2121214342619. The next prime is 2121214342699. The reversal of 2121214342621 is 1262434121212.

It is a cyclic number.

It is not a de Polignac number, because 2121214342621 - 2¹ = 2121214342619 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 (2121214343621) 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, 241125 + ... + 2073781.

It is an arithmetic number, because the mean of its divisors is an integer number (145861250220).

Almost surely, 2^{2121214342621} is an apocalyptic number.

It is an amenable number.

2121214342621 is a deficient number, since it is larger than the sum of its proper divisors (212565660899).

2121214342621 is a wasteful number, since it uses less digits than its factorization.

2121214342621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833564.

The product of its digits is 9216, while the sum is 31.

Adding to 2121214342621 its reverse (1262434121212), we get a palindrome (3383648463833).

The spelling of 2121214342621 in words is "two trillion, one hundred twenty-one billion, two hundred fourteen million, three hundred forty-two thousand, six hundred twenty-one".