1318121010 has 96 divisors (see below), whose sum is σ = 3819778560. Its totient is φ = 313403904.

The previous prime is 1318120997. The next prime is 1318121033. The reversal of 1318121010 is 101218131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6399 + ... + 51741.

It is an arithmetic number, because the mean of its divisors is an integer number (39789360).

Almost surely, 2^1318121010 is an apocalyptic number.

1318121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318121010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909889280).

1318121010 is an abundant number, since it is smaller than the sum of its proper divisors (2501657550).

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

1318121010 is a wasteful number, since it uses less digits than its factorization.

1318121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45392 (or 45389 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1318121010 is about 36305.9362914662. The cubic root of 1318121010 is about 1096.4405634863.

Adding to 1318121010 its reverse (101218131), we get a palindrome (1419339141).

It can be divided in two parts, 13181 and 21010, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 1318121010 in words is "one billion, three hundred eighteen million, one hundred twenty-one thousand, ten".