12122221122021 has 8 divisors (see below), whose sum is σ = 16404199727584. Its totient is φ = 7960861632240.

The previous prime is 12122221121993. The next prime is 12122221122061. The reversal of 12122221122021 is 12022112222121.

12122221122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12122221122021 - 2¹⁴ = 12122221105637 is a prime.

It is a super-2 number, since 2×12122221122021² (a number of 27 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 (12122221122061) 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, 30154778710 + ... + 30154779111.

It is an arithmetic number, because the mean of its divisors is an integer number (2050524965948).

Almost surely, 2^{12122221122021} is an apocalyptic number.

It is an amenable number.

12122221122021 is a deficient number, since it is larger than the sum of its proper divisors (4281978605563).

12122221122021 is an equidigital number, since it uses as much as digits as its factorization.

12122221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60309557891.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12122221122021 its reverse (12022112222121), we get a palindrome (24144333344142).

The spelling of 12122221122021 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".