1221222022 has 16 divisors (see below), whose sum is σ = 1840488912. Its totient is φ = 607733280.

The previous prime is 1221222019. The next prime is 1221222031. The reversal of 1221222022 is 2202221221.

It is a junction number, because it is equal to n+sod(n) for n = 1221221987 and 1221222005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428133 + ... + 430975.

It is an arithmetic number, because the mean of its divisors is an integer number (115030557).

Almost surely, 2^1221222022 is an apocalyptic number.

1221222022 is a deficient number, since it is larger than the sum of its proper divisors (619266890).

1221222022 is a wasteful number, since it uses less digits than its factorization.

1221222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1221222022 is about 34945.9872088341. The cubic root of 1221222022 is about 1068.8863779913.

Adding to 1221222022 its reverse (2202221221), we get a palindrome (3423443243).

The spelling of 1221222022 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-two".