12021010010221 has 4 divisors (see below), whose sum is σ = 12021087934944. Its totient is φ = 12020932085500.

The previous prime is 12021010010209. The next prime is 12021010010309. The reversal of 12021010010221 is 12201001012021.

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 12021010010221 - 2⁵ = 12021010010189 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 (12021010017221) 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, 38730505 + ... + 39039646.

It is an arithmetic number, because the mean of its divisors is an integer number (3005271983736).

Almost surely, 2^{12021010010221} is an apocalyptic number.

It is an amenable number.

12021010010221 is a deficient number, since it is larger than the sum of its proper divisors (77924723).

12021010010221 is an equidigital number, since it uses as much as digits as its factorization.

12021010010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77924722.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021010010221 its reverse (12201001012021), we get a palindrome (24222011022242).

The spelling of 12021010010221 in words is "twelve trillion, twenty-one billion, ten million, ten thousand, two hundred twenty-one".