12122022211021 has 4 divisors (see below), whose sum is σ = 12122684381632. Its totient is φ = 12121360040412.

The previous prime is 12122022211009. The next prime is 12122022211063. The reversal of 12122022211021 is 12011222022121.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122022211021 is a prime.

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 12122022211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122022212021) 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 3 ways as a sum of consecutive naturals, for example, 331057845 + ... + 331094458.

It is an arithmetic number, because the mean of its divisors is an integer number (3030671095408).

Almost surely, 2^{12122022211021} is an apocalyptic number.

It is an amenable number.

12122022211021 is a deficient number, since it is larger than the sum of its proper divisors (662170611).

12122022211021 is an equidigital number, since it uses as much as digits as its factorization.

12122022211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662170610.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12122022211021 its reverse (12011222022121), we get a palindrome (24133244233142).

The spelling of 12122022211021 in words is "twelve trillion, one hundred twenty-two billion, twenty-two million, two hundred eleven thousand, twenty-one".