1020031011 has 6 divisors (see below), whose sum is σ = 1473378140. Its totient is φ = 680020668.

The previous prime is 1020030983. The next prime is 1020031021. The reversal of 1020031011 is 1101300201.

It is not a de Polignac number, because 1020031011 - 2⁹ = 1020030499 is a prime.

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: 113336779 = 1020031011 / (1 + 0 + 2 + 0 + 0 + 3 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020030984 and 1020031002.

It is not an unprimeable number, because it can be changed into a prime (1020031021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56668381 + ... + 56668398.

Almost surely, 2^1020031011 is an apocalyptic number.

1020031011 is a deficient number, since it is larger than the sum of its proper divisors (453347129).

1020031011 is a wasteful number, since it uses less digits than its factorization.

1020031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113336785 (or 113336782 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1020031011 is about 31937.9243376898. The cubic root of 1020031011 is about 1006.6329108871.

Adding to 1020031011 its reverse (1101300201), we get a palindrome (2121331212).

The spelling of 1020031011 in words is "one billion, twenty million, thirty-one thousand, eleven".