1210221404 has 18 divisors (see below), whose sum is σ = 2463665400. Its totient is φ = 518666232.

The previous prime is 1210221403. The next prime is 1210221407. The reversal of 1210221404 is 4041220121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210221403) 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 5 ways as a sum of consecutive naturals, for example, 3087104 + ... + 3087495.

It is an arithmetic number, because the mean of its divisors is an integer number (136870300).

Almost surely, 2^1210221404 is an apocalyptic number.

1210221404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1210221404 is an abundant number, since it is smaller than the sum of its proper divisors (1253443996).

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

1210221404 is a wasteful number, since it uses less digits than its factorization.

1210221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174617 (or 6174608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1210221404 is about 34788.2365750263. The cubic root of 1210221404 is about 1065.6672269069.

Adding to 1210221404 its reverse (4041220121), we get a palindrome (5251441525).

The spelling of 1210221404 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, four hundred four".