1422211221 has 12 divisors (see below), whose sum is σ = 2057079648. Its totient is φ = 946860264.

The previous prime is 1422211183. The next prime is 1422211223. The reversal of 1422211221 is 1221122241.

1422211221 is a `hidden beast` number, since 1 + 422 + 21 + 1 + 221 = 666.

It is not a de Polignac number, because 1422211221 - 2⁷ = 1422211093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1422211194 and 1422211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422211223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99655 + ... + 113028.

It is an arithmetic number, because the mean of its divisors is an integer number (171423304).

Almost surely, 2^1422211221 is an apocalyptic number.

It is an amenable number.

1422211221 is a deficient number, since it is larger than the sum of its proper divisors (634868427).

1422211221 is a wasteful number, since it uses less digits than its factorization.

1422211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213432 (or 213429 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1422211221 is about 37712.2158060223. The cubic root of 1422211221 is about 1124.5739874396.

Adding to 1422211221 its reverse (1221122241), we get a palindrome (2643333462).

The spelling of 1422211221 in words is "one billion, four hundred twenty-two million, two hundred eleven thousand, two hundred twenty-one".