12122210021021 has 8 divisors (see below), whose sum is σ = 12128693523000. Its totient is φ = 12115727331840.

The previous prime is 12122210021017. The next prime is 12122210021063. The reversal of 12122210021021 is 12012001222121.

It can be written as a sum of positive squares in 4 ways, for example, as 23910436900 + 12098299584121 = 154630^2 + 3478261^2 .

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 12122210021021 - 2² = 12122210021017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122210021321) 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, 30899705 + ... + 31289553.

It is an arithmetic number, because the mean of its divisors is an integer number (1516086690375).

Almost surely, 2^{12122210021021} is an apocalyptic number.

It is an amenable number.

12122210021021 is a deficient number, since it is larger than the sum of its proper divisors (6483501979).

12122210021021 is a wasteful number, since it uses less digits than its factorization.

12122210021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406399.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12122210021021 its reverse (12012001222121), we get a palindrome (24134211243142).

The spelling of 12122210021021 in words is "twelve trillion, one hundred twenty-two billion, two hundred ten million, twenty-one thousand, twenty-one".