1021045055 has 16 divisors (see below), whose sum is σ = 1231555104. Its totient is φ = 812649600.

The previous prime is 1021045043. The next prime is 1021045121. The reversal of 1021045055 is 5505401201.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1021045055 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 1021045055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456205 + ... + 1456905.

It is an arithmetic number, because the mean of its divisors is an integer number (76972194).

Almost surely, 2^1021045055 is an apocalyptic number.

1021045055 is a deficient number, since it is larger than the sum of its proper divisors (210510049).

1021045055 is an equidigital number, since it uses as much as digits as its factorization.

1021045055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1021045055 is about 31953.7956274368. The cubic root of 1021045055 is about 1006.9663752555.

Adding to 1021045055 its reverse (5505401201), we get a palindrome (6526446256).

The spelling of 1021045055 in words is "one billion, twenty-one million, forty-five thousand, fifty-five".