1313121012 has 36 divisors (see below), whose sum is σ = 3564187200. Its totient is φ = 375177264.

The previous prime is 1313121011. The next prime is 1313121031. The reversal of 1313121012 is 2101213131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1313120982 and 1313121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313121011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116012 + ... + 1117187.

It is an arithmetic number, because the mean of its divisors is an integer number (99005200).

Almost surely, 2^1313121012 is an apocalyptic number.

1313121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1313121012 is an abundant number, since it is smaller than the sum of its proper divisors (2251066188).

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

1313121012 is a wasteful number, since it uses less digits than its factorization.

1313121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233220 (or 2233211 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1313121012 is about 36237.0116317557. The cubic root of 1313121012 is about 1095.0524392643.

Adding to 1313121012 its reverse (2101213131), we get a palindrome (3414334143).

It can be divided in two parts, 13131 and 21012, that added together give a palindrome (34143).

The spelling of 1313121012 in words is "one billion, three hundred thirteen million, one hundred twenty-one thousand, twelve".