1020420031 has 2 divisors, whose sum is σ = 1020420032. Its totient is φ = 1020420030.

The previous prime is 1020419993. The next prime is 1020420041. The reversal of 1020420031 is 1300240201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020420031 - 2¹⁷ = 1020288959 is a prime.

It is a super-2 number, since 2×1020420031² = 2082514079332081922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020419993 and 1020420020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020420041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510210015 + 510210016.

It is an arithmetic number, because the mean of its divisors is an integer number (510210016).

Almost surely, 2^1020420031 is an apocalyptic number.

1020420031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020420031 is an equidigital number, since it uses as much as digits as its factorization.

1020420031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1020420031 is about 31944.0140088875. The cubic root of 1020420031 is about 1006.7608646971.

Adding to 1020420031 its reverse (1300240201), we get a palindrome (2320660232).

The spelling of 1020420031 in words is "one billion, twenty million, four hundred twenty thousand, thirty-one".