1221330022 has 8 divisors (see below), whose sum is σ = 1998540072. Its totient is φ = 555150000.

The previous prime is 1221329959. The next prime is 1221330029. The reversal of 1221330022 is 2200331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1221329978 and 1221330005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221330029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27757479 + ... + 27757522.

It is an arithmetic number, because the mean of its divisors is an integer number (249817509).

Almost surely, 2^1221330022 is an apocalyptic number.

1221330022 is a deficient number, since it is larger than the sum of its proper divisors (777210050).

1221330022 is a wasteful number, since it uses less digits than its factorization.

1221330022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55515014.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1221330022 is about 34947.5324164668. The cubic root of 1221330022 is about 1068.9178864105.

Adding to 1221330022 its reverse (2200331221), we get a palindrome (3421661243).

The spelling of 1221330022 in words is "one billion, two hundred twenty-one million, three hundred thirty thousand, twenty-two".