12021222212021 has 48 divisors (see below), whose sum is σ = 13542708135600. Its totient is φ = 10659937812480.

The previous prime is 12021222212017. The next prime is 12021222212047.

12021222212021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 53005852900 + 11968216359121 = 230230^2 + 3459511^2 .

It is not a de Polignac number, because 12021222212021 - 2² = 12021222212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021222211984 and 12021222212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021222212011) 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 47 ways as a sum of consecutive naturals, for example, 325504085 + ... + 325541013.

It is an arithmetic number, because the mean of its divisors is an integer number (282139752825).

Almost surely, 2^{12021222212021} is an apocalyptic number.

12021222212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12021222212021 is a deficient number, since it is larger than the sum of its proper divisors (1521485923579).

12021222212021 is a wasteful number, since it uses less digits than its factorization.

12021222212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37430 (or 37419 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 1202122 and 2212021, that added together give a palindrome (3414143).

The spelling of 12021222212021 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, twenty-one".