12225282481021 has 4 divisors (see below), whose sum is σ = 12225790600444. Its totient is φ = 12224774361600.

The previous prime is 12225282480989. The next prime is 12225282481037. The reversal of 12225282481021 is 12018428252221.

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 7464206484900 + 4761075996121 = 2732070^2 + 2181989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12225282481021 - 2⁵ = 12225282480989 is a prime.

It is a super-3 number, since 3×12225282481021³ (a number of 40 digits) contains 333 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 (12225292481021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254023620 + ... + 254071741.

It is an arithmetic number, because the mean of its divisors is an integer number (3056447650111).

Almost surely, 2^{12225282481021} is an apocalyptic number.

It is an amenable number.

12225282481021 is a deficient number, since it is larger than the sum of its proper divisors (508119423).

12225282481021 is an equidigital number, since it uses as much as digits as its factorization.

12225282481021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508119422.

The product of its (nonzero) digits is 81920, while the sum is 40.

The spelling of 12225282481021 in words is "twelve trillion, two hundred twenty-five billion, two hundred eighty-two million, four hundred eighty-one thousand, twenty-one".