1220121222 has 16 divisors (see below), whose sum is σ = 2492163072. Its totient is φ = 398053640.

The previous prime is 1220121169. The next prime is 1220121247. The reversal of 1220121222 is 2221210221.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2163054 + ... + 2163617.

It is an arithmetic number, because the mean of its divisors is an integer number (155760192).

Almost surely, 2^1220121222 is an apocalyptic number.

1220121222 is an abundant number, since it is smaller than the sum of its proper divisors (1272041850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220121222 is a wasteful number, since it uses less digits than its factorization.

1220121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326723.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1220121222 is about 34930.2336379246. The cubic root of 1220121222 is about 1068.5651194989.

Adding to 1220121222 its reverse (2221210221), we get a palindrome (3441331443).

The spelling of 1220121222 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-two".