12122022100021 has 4 divisors (see below), whose sum is σ = 12760023263200. Its totient is φ = 11484020936844.

The previous prime is 12122022099961. The next prime is 12122022100049. The reversal of 12122022100021 is 12000122022121.

It is a happy number.

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 not a de Polignac number, because 12122022100021 - 2²⁹ = 12121485229109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122022099968 and 12122022100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122022100421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319000581561 + ... + 319000581598.

It is an arithmetic number, because the mean of its divisors is an integer number (3190005815800).

Almost surely, 2^{12122022100021} is an apocalyptic number.

It is an amenable number.

12122022100021 is a deficient number, since it is larger than the sum of its proper divisors (638001163179).

12122022100021 is an equidigital number, since it uses as much as digits as its factorization.

12122022100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638001163178.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12122022100021 its reverse (12000122022121), we get a palindrome (24122144122142).

The spelling of 12122022100021 in words is "twelve trillion, one hundred twenty-two billion, twenty-two million, one hundred thousand, twenty-one".