1220221002 has 384 divisors, whose sum is σ = 3762984960. Its totient is φ = 253808640.

The previous prime is 1220220973. The next prime is 1220221043. The reversal of 1220221002 is 2001220221.

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 191 ways as a sum of consecutive naturals, for example, 32978928 + ... + 32978964.

It is an arithmetic number, because the mean of its divisors is an integer number (9799440).

Almost surely, 2^1220221002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220221002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881492480).

1220221002 is an abundant number, since it is smaller than the sum of its proper divisors (2542763958).

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

1220221002 is a wasteful number, since it uses less digits than its factorization.

1220221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220221002 is about 34931.6618843135. The cubic root of 1220221002 is about 1068.5942473482.

Adding to 1220221002 its reverse (2001220221), we get a palindrome (3221441223).

It can be divided in two parts, 1220 and 221002, that added together give a palindrome (222222).

The spelling of 1220221002 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, two".