1031413021 has 2 divisors, whose sum is σ = 1031413022. Its totient is φ = 1031413020.

The previous prime is 1031413013. The next prime is 1031413049. The reversal of 1031413021 is 1203141301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821452921 + 209960100 = 28661^2 + 14490^2 .

It is an emirp because it is prime and its reverse (1203141301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031413021 - 2³ = 1031413013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031412986 and 1031413004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031413091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515706510 + 515706511.

It is an arithmetic number, because the mean of its divisors is an integer number (515706511).

Almost surely, 2^1031413021 is an apocalyptic number.

It is an amenable number.

1031413021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031413021 is an equidigital number, since it uses as much as digits as its factorization.

1031413021 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 1031413021 is about 32115.6195798867. The cubic root of 1031413021 is about 1010.3632392790.

Adding to 1031413021 its reverse (1203141301), we get a palindrome (2234554322).

The spelling of 1031413021 in words is "one billion, thirty-one million, four hundred thirteen thousand, twenty-one".