1221022022 has 32 divisors (see below), whose sum is σ = 2088820224. Its totient is φ = 529883200.

The previous prime is 1221022021. The next prime is 1221022031. The reversal of 1221022022 is 2202201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221021988 and 1221022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221022021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310247 + ... + 314157.

It is an arithmetic number, because the mean of its divisors is an integer number (65275632).

Almost surely, 2^1221022022 is an apocalyptic number.

1221022022 is a deficient number, since it is larger than the sum of its proper divisors (867798202).

1221022022 is a wasteful number, since it uses less digits than its factorization.

1221022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1221022022 is about 34943.1255327854. The cubic root of 1221022022 is about 1068.8280241613.

Adding to 1221022022 its reverse (2202201221), we get a palindrome (3423223243).

The spelling of 1221022022 in words is "one billion, two hundred twenty-one million, twenty-two thousand, twenty-two".