1421221044 has 12 divisors (see below), whose sum is σ = 3316182464. Its totient is φ = 473740344.

The previous prime is 1421220959. The next prime is 1421221057. The reversal of 1421221044 is 4401221241.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1421221044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59217532 + ... + 59217555.

Almost surely, 2^1421221044 is an apocalyptic number.

It is an amenable number.

1421221044 is an abundant number, since it is smaller than the sum of its proper divisors (1894961420).

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

1421221044 is a wasteful number, since it uses less digits than its factorization.

1421221044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118435094 (or 118435092 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1421221044 is about 37699.0854530982. The cubic root of 1421221044 is about 1124.3129418691.

Adding to 1421221044 its reverse (4401221241), we get a palindrome (5822442285).

The spelling of 1421221044 in words is "one billion, four hundred twenty-one million, two hundred twenty-one thousand, forty-four".