1020231312 has 20 divisors (see below), whose sum is σ = 2635597680. Its totient is φ = 340077088.

The previous prime is 1020231307. The next prime is 1020231313. The reversal of 1020231312 is 2131320201.

It is a junction number, because it is equal to n+sod(n) for n = 1020231291 and 1020231300.

It is not an unprimeable number, because it can be changed into a prime (1020231313) 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, 10627362 + ... + 10627457.

It is an arithmetic number, because the mean of its divisors is an integer number (131779884).

Almost surely, 2^1020231312 is an apocalyptic number.

1020231312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020231312 is an abundant number, since it is smaller than the sum of its proper divisors (1615366368).

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

1020231312 is a wasteful number, since it uses less digits than its factorization.

1020231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21254830 (or 21254824 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1020231312 is about 31941.0599698883. The cubic root of 1020231312 is about 1006.6987965906.

Adding to 1020231312 its reverse (2131320201), we get a palindrome (3151551513).

Subtracting 1020231312 from its reverse (2131320201), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 10202 and 31312, that added together give a palindrome (41514).

The spelling of 1020231312 in words is "one billion, twenty million, two hundred thirty-one thousand, three hundred twelve".