1011031020 has 72 divisors (see below), whose sum is σ = 3108845376. Its totient is φ = 265911552.

The previous prime is 1011030997. The next prime is 1011031027. The reversal of 1011031020 is 201301101.

1011031020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1011030993 and 1011031011.

It is not an unprimeable number, because it can be changed into a prime (1011031027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25332 + ... + 51611.

It is an arithmetic number, because the mean of its divisors is an integer number (43178408).

Almost surely, 2^1011031020 is an apocalyptic number.

1011031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011031020 is an abundant number, since it is smaller than the sum of its proper divisors (2097814356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011031020 is a wasteful number, since it uses less digits than its factorization.

1011031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77031 (or 77026 counting only the distinct ones).

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

The square root of 1011031020 is about 31796.7139811648. The cubic root of 1011031020 is about 1003.6635685417.

Adding to 1011031020 its reverse (201301101), we get a palindrome (1212332121).

The spelling of 1011031020 in words is "one billion, eleven million, thirty-one thousand, twenty".