1312202120 has 64 divisors (see below), whose sum is σ = 3170275200. Its totient is φ = 487029760.

The previous prime is 1312202113. The next prime is 1312202123. The reversal of 1312202120 is 212022131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312202095 and 1312202104.

It is not an unprimeable number, because it can be changed into a prime (1312202123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34691 + ... + 61869.

It is an arithmetic number, because the mean of its divisors is an integer number (49535550).

Almost surely, 2^1312202120 is an apocalyptic number.

1312202120 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 1312202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585137600).

1312202120 is an abundant number, since it is smaller than the sum of its proper divisors (1858073080).

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

1312202120 is a wasteful number, since it uses less digits than its factorization.

1312202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27278 (or 27274 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1312202120 is about 36224.3304976089. The cubic root of 1312202120 is about 1094.7969487899.

Adding to 1312202120 its reverse (212022131), we get a palindrome (1524224251).

The spelling of 1312202120 in words is "one billion, three hundred twelve million, two hundred two thousand, one hundred twenty".