1312232020 has 96 divisors (see below), whose sum is σ = 3146169600. Its totient is φ = 455347200.

The previous prime is 1312231997. The next prime is 1312232083. The reversal of 1312232020 is 202322131.

It is a junction number, because it is equal to n+sod(n) for n = 1312231985 and 1312232003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566665 + ... + 568975.

It is an arithmetic number, because the mean of its divisors is an integer number (32772600).

Almost surely, 2^1312232020 is an apocalyptic number.

1312232020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312232020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573084800).

1312232020 is an abundant number, since it is smaller than the sum of its proper divisors (1833937580).

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

1312232020 is a wasteful number, since it uses less digits than its factorization.

1312232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1312232020 is about 36224.7432012982. The cubic root of 1312232020 is about 1094.8052641197.

Adding to 1312232020 its reverse (202322131), we get a palindrome (1514554151).

It can be divided in two parts, 1312 and 232020, that added together give a palindrome (233332).

The spelling of 1312232020 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, twenty".