12102212012021 has 4 divisors (see below), whose sum is σ = 12102839967372. Its totient is φ = 12101584056672.

The previous prime is 12102212011997. The next prime is 12102212012083. The reversal of 12102212012021 is 12021021220121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5484430036996 + 6617781975025 = 2341886^2 + 2572505^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102212012021 - 2¹⁴ = 12102211995637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102212812021) 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, 313948766 + ... + 313987311.

It is an arithmetic number, because the mean of its divisors is an integer number (3025709991843).

Almost surely, 2^{12102212012021} is an apocalyptic number.

It is an amenable number.

12102212012021 is a deficient number, since it is larger than the sum of its proper divisors (627955351).

12102212012021 is an equidigital number, since it uses as much as digits as its factorization.

12102212012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627955350.

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

Adding to 12102212012021 its reverse (12021021220121), we get a palindrome (24123233232142).

The spelling of 12102212012021 in words is "twelve trillion, one hundred two billion, two hundred twelve million, twelve thousand, twenty-one".