1023143021 has 4 divisors (see below), whose sum is σ = 1034639100. Its totient is φ = 1011646944.

The previous prime is 1023142993. The next prime is 1023143081. The reversal of 1023143021 is 1203413201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115326121 + 907816900 = 10739^2 + 30130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023143021 - 2¹⁰ = 1023141997 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 (1023143081) 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, 5747906 + ... + 5748083.

It is an arithmetic number, because the mean of its divisors is an integer number (258659775).

Almost surely, 2^1023143021 is an apocalyptic number.

It is an amenable number.

1023143021 is a deficient number, since it is larger than the sum of its proper divisors (11496079).

1023143021 is an equidigital number, since it uses as much as digits as its factorization.

1023143021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496078.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1023143021 is about 31986.6069003888. The cubic root of 1023143021 is about 1007.6555828256.

Adding to 1023143021 its reverse (1203413201), we get a palindrome (2226556222).

The spelling of 1023143021 in words is "one billion, twenty-three million, one hundred forty-three thousand, twenty-one".