1222001010221 has 4 divisors (see below), whose sum is σ = 1222014057312. Its totient is φ = 1221987963132.

The previous prime is 1222001010163. The next prime is 1222001010227. The reversal of 1222001010221 is 1220101002221.

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 1222001010221 - 2⁶ = 1222001010157 is a prime.

It is a super-2 number, since 2×1222001010221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222001010196 and 1222001010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222001010227) 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, 6382031 + ... + 6570716.

It is an arithmetic number, because the mean of its divisors is an integer number (305503514328).

Almost surely, 2^{1222001010221} is an apocalyptic number.

It is an amenable number.

1222001010221 is a deficient number, since it is larger than the sum of its proper divisors (13047091).

1222001010221 is an equidigital number, since it uses as much as digits as its factorization.

1222001010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13047090.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1222001010221 its reverse (1220101002221), we get a palindrome (2442102012442).

The spelling of 1222001010221 in words is "one trillion, two hundred twenty-two billion, one million, ten thousand, two hundred twenty-one".