1021044401 has 16 divisors (see below), whose sum is σ = 1170489600. Its totient is φ = 882845568.

The previous prime is 1021044389. The next prime is 1021044419. The reversal of 1021044401 is 1044401201.

It is a cyclic number.

It is not a de Polignac number, because 1021044401 - 2²² = 1016850097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021044401.

It is not an unprimeable number, because it can be changed into a prime (1021044421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241 + ... + 45206.

It is an arithmetic number, because the mean of its divisors is an integer number (73155600).

Almost surely, 2^1021044401 is an apocalyptic number.

It is an amenable number.

1021044401 is a deficient number, since it is larger than the sum of its proper divisors (149445199).

1021044401 is a wasteful number, since it uses less digits than its factorization.

1021044401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46568.

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

The square root of 1021044401 is about 31953.7853939091. The cubic root of 1021044401 is about 1006.9661602614.

Adding to 1021044401 its reverse (1044401201), we get a palindrome (2065445602).

The spelling of 1021044401 in words is "one billion, twenty-one million, forty-four thousand, four hundred one".