1313012121220 has 12 divisors (see below), whose sum is σ = 2757325454604. Its totient is φ = 525204848480.

The previous prime is 1313012121173. The next prime is 1313012121221. The reversal of 1313012121220 is 221212103131.

It can be written as a sum of positive squares in 2 ways, for example, as 156716223876 + 1156295897344 = 395874^2 + 1075312^2 .

It is not an unprimeable number, because it can be changed into a prime (1313012121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32825303011 + ... + 32825303050.

It is an arithmetic number, because the mean of its divisors is an integer number (229777121217).

Almost surely, 2^{1313012121220} is an apocalyptic number.

1313012121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313012121220 is an abundant number, since it is smaller than the sum of its proper divisors (1444313333384).

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

1313012121220 is a wasteful number, since it uses less digits than its factorization.

1313012121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65650606070 (or 65650606068 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1313012121220 its reverse (221212103131), we get a palindrome (1534224224351).

The spelling of 1313012121220 in words is "one trillion, three hundred thirteen billion, twelve million, one hundred twenty-one thousand, two hundred twenty".