1003143121 has 2 divisors, whose sum is σ = 1003143122. Its totient is φ = 1003143120.

The previous prime is 1003143107. The next prime is 1003143161. The reversal of 1003143121 is 1213413001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902341521 + 100801600 = 30039^2 + 10040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003143121 - 2²⁵ = 969588689 is a prime.

It is a super-2 number, since 2×1003143121² = 2012592242419241282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1003143095 and 1003143104.

It is not a weakly prime, because it can be changed into another prime (1003143101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501571560 + 501571561.

It is an arithmetic number, because the mean of its divisors is an integer number (501571561).

Almost surely, 2^1003143121 is an apocalyptic number.

It is an amenable number.

1003143121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003143121 is an equidigital number, since it uses as much as digits as its factorization.

1003143121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1003143121 is about 31672.4347185372. The cubic root of 1003143121 is about 1001.0466112228.

Adding to 1003143121 its reverse (1213413001), we get a palindrome (2216556122).

The spelling of 1003143121 in words is "one billion, three million, one hundred forty-three thousand, one hundred twenty-one".