10222212321221 has 4 divisors (see below), whose sum is σ = 10222304216172. Its totient is φ = 10222120426272.

The previous prime is 10222212321161. The next prime is 10222212321311. The reversal of 10222212321221 is 12212321222201.

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 8977448145121 + 1244764176100 = 2996239^2 + 1115690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10222212321221 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 (10222212329221) 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, 45780416 + ... + 46003161.

It is an arithmetic number, because the mean of its divisors is an integer number (2555576054043).

Almost surely, 2^{10222212321221} is an apocalyptic number.

It is an amenable number.

10222212321221 is a deficient number, since it is larger than the sum of its proper divisors (91894951).

10222212321221 is an equidigital number, since it uses as much as digits as its factorization.

10222212321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91894950.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 10222212321221 its reverse (12212321222201), we get a palindrome (22434533543422).

The spelling of 10222212321221 in words is "ten trillion, two hundred twenty-two billion, two hundred twelve million, three hundred twenty-one thousand, two hundred twenty-one".