1020031021 has 2 divisors, whose sum is σ = 1020031022. Its totient is φ = 1020031020.

The previous prime is 1020030983. The next prime is 1020031031. The reversal of 1020031021 is 1201300201.

1020031021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (1020031031) can be obtained adding 1020031021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526702500 + 493328521 = 22950^2 + 22211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020031021 - 2¹¹ = 1020028973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020030989 and 1020031007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020031031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510015510 + 510015511.

It is an arithmetic number, because the mean of its divisors is an integer number (510015511).

Almost surely, 2^1020031021 is an apocalyptic number.

It is an amenable number.

1020031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020031021 is an equidigital number, since it uses as much as digits as its factorization.

1020031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1020031021 is about 31937.9244942435. The cubic root of 1020031021 is about 1006.6329141766.

Adding to 1020031021 its reverse (1201300201), we get a palindrome (2221331222).

The spelling of 1020031021 in words is "one billion, twenty million, thirty-one thousand, twenty-one".