3681121012 has 12 divisors (see below), whose sum is σ = 6444174240. Its totient is φ = 1839928376.

The previous prime is 3681121007. The next prime is 3681121039. The reversal of 3681121012 is 2101211863.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144808 + ... + 168319.

It is an arithmetic number, because the mean of its divisors is an integer number (537014520).

Almost surely, 2^3681121012 is an apocalyptic number.

It is an amenable number.

3681121012 is a deficient number, since it is larger than the sum of its proper divisors (2763053228).

3681121012 is a wasteful number, since it uses less digits than its factorization.

3681121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316070 (or 316068 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 3681121012 is about 60672.2425166567. The cubic root of 3681121012 is about 1544.0452778520.

Adding to 3681121012 its reverse (2101211863), we get a palindrome (5782332875).

The spelling of 3681121012 in words is "three billion, six hundred eighty-one million, one hundred twenty-one thousand, twelve".