1021143005 has 4 divisors (see below), whose sum is σ = 1225371612. Its totient is φ = 816914400.

The previous prime is 1021143001. The next prime is 1021143017. The reversal of 1021143005 is 5003411201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5003411201 = 79 ⋅63334319.

It can be written as a sum of positive squares in 2 ways, for example, as 184660921 + 836482084 = 13589^2 + 28922^2 .

It is not a de Polignac number, because 1021143005 - 2² = 1021143001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021143001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102114296 + ... + 102114305.

It is an arithmetic number, because the mean of its divisors is an integer number (306342903).

Almost surely, 2^1021143005 is an apocalyptic number.

It is an amenable number.

1021143005 is a deficient number, since it is larger than the sum of its proper divisors (204228607).

1021143005 is an equidigital number, since it uses as much as digits as its factorization.

1021143005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204228606.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1021143005 is about 31955.3282724493. The cubic root of 1021143005 is about 1006.9985740314.

Adding to 1021143005 its reverse (5003411201), we get a palindrome (6024554206).

The spelling of 1021143005 in words is "one billion, twenty-one million, one hundred forty-three thousand, five".