10212221021221 has 4 divisors (see below), whose sum is σ = 10212249161344. Its totient is φ = 10212192881100.

The previous prime is 10212221021201. The next prime is 10212221021243. The reversal of 10212221021221 is 12212012221201.

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 10212221021221 - 2¹⁷ = 10212220890149 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 (10212221021201) 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 3 ways as a sum of consecutive naturals, for example, 13518495 + ... + 14253916.

It is an arithmetic number, because the mean of its divisors is an integer number (2553062290336).

Almost surely, 2^{10212221021221} is an apocalyptic number.

It is an amenable number.

10212221021221 is a deficient number, since it is larger than the sum of its proper divisors (28140123).

10212221021221 is an equidigital number, since it uses as much as digits as its factorization.

10212221021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28140122.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10212221021221 its reverse (12212012221201), we get a palindrome (22424233242422).

The spelling of 10212221021221 in words is "ten trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".