4121781687212 has 24 divisors (see below), whose sum is σ = 8601979174656. Its totient is φ = 1689674480208.

The previous prime is 4121781687211. The next prime is 4121781687239. The reversal of 4121781687212 is 2127861871214.

It is not an unprimeable number, because it can be changed into a prime (4121781687211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3200140418 + ... + 3200141705.

It is an arithmetic number, because the mean of its divisors is an integer number (358415798944).

Almost surely, 2^{4121781687212} is an apocalyptic number.

It is an amenable number.

4121781687212 is an abundant number, since it is smaller than the sum of its proper divisors (4480197487444).

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

4121781687212 is a wasteful number, since it uses less digits than its factorization.

4121781687212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400282157 (or 6400282155 counting only the distinct ones).

The product of its digits is 602112, while the sum is 50.

The spelling of 4121781687212 in words is "four trillion, one hundred twenty-one billion, seven hundred eighty-one million, six hundred eighty-seven thousand, two hundred twelve".