1020011320 has 16 divisors (see below), whose sum is σ = 2295025560. Its totient is φ = 408004512.

The previous prime is 1020011303. The next prime is 1020011327. The reversal of 1020011320 is 231100201.

It is a super-4 number, since 4×1020011320⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020011297 and 1020011306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12750102 + ... + 12750181.

Almost surely, 2^1020011320 is an apocalyptic number.

1020011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020011320 is an abundant number, since it is smaller than the sum of its proper divisors (1275014240).

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

1020011320 is a wasteful number, since it uses less digits than its factorization.

1020011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25500294 (or 25500290 counting only the distinct ones).

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

The square root of 1020011320 is about 31937.6160663253. The cubic root of 1020011320 is about 1006.6264333924.

Adding to 1020011320 its reverse (231100201), we get a palindrome (1251111521).

The spelling of 1020011320 in words is "one billion, twenty million, eleven thousand, three hundred twenty".