1313111020 has 48 divisors (see below), whose sum is σ = 3065465088. Its totient is φ = 469198080.

The previous prime is 1313111011. The next prime is 1313111029. The reversal of 1313111020 is 201113131.

It is an interprime number because it is at equal distance from previous prime (1313111011) and next prime (1313111029).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1313111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73399 + ... + 89518.

It is an arithmetic number, because the mean of its divisors is an integer number (63863856).

Almost surely, 2^1313111020 is an apocalyptic number.

1313111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313111020 is an abundant number, since it is smaller than the sum of its proper divisors (1752354068).

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

1313111020 is a wasteful number, since it uses less digits than its factorization.

1313111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162970 (or 162968 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1313111020 is about 36236.8737614050. The cubic root of 1313111020 is about 1095.0496617107.

Adding to 1313111020 its reverse (201113131), we get a palindrome (1514224151).

The spelling of 1313111020 in words is "one billion, three hundred thirteen million, one hundred eleven thousand, twenty".