1020200031 has 6 divisors (see below), whose sum is σ = 1473622280. Its totient is φ = 680133348.

The previous prime is 1020200023. The next prime is 1020200033. The reversal of 1020200031 is 1300020201.

It is a happy number.

It is not a de Polignac number, because 1020200031 - 2³ = 1020200023 is a prime.

It is a super-2 number, since 2×1020200031² = 2081616206504801922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 113355559 = 1020200031 / (1 + 0 + 2 + 0 + 2 + 0 + 0 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020199986 and 1020200022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56677771 + ... + 56677788.

Almost surely, 2^1020200031 is an apocalyptic number.

1020200031 is a deficient number, since it is larger than the sum of its proper divisors (453422249).

1020200031 is a wasteful number, since it uses less digits than its factorization.

1020200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113355565 (or 113355562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1020200031 is about 31940.5702986030. The cubic root of 1020200031 is about 1006.6885077909.

Adding to 1020200031 its reverse (1300020201), we get a palindrome (2320220232).

The spelling of 1020200031 in words is "one billion, twenty million, two hundred thousand, thirty-one".