1313123001220 has 48 divisors (see below), whose sum is σ = 2821436448768. Its totient is φ = 513123258240.

The previous prime is 1313123001209. The next prime is 1313123001247. The reversal of 1313123001220 is 221003213131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782532 + ... + 1799611.

It is an arithmetic number, because the mean of its divisors is an integer number (58779926016).

Almost surely, 2^{1313123001220} is an apocalyptic number.

1313123001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313123001220 is an abundant number, since it is smaller than the sum of its proper divisors (1508313447548).

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

1313123001220 is a wasteful number, since it uses less digits than its factorization.

1313123001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582740 (or 2582738 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1313123001220 its reverse (221003213131), we get a palindrome (1534126214351).

The spelling of 1313123001220 in words is "one trillion, three hundred thirteen billion, one hundred twenty-three million, one thousand, two hundred twenty".