4021215130779 has 48 divisors (see below), whose sum is σ = 6756916508160. Its totient is φ = 2082225657600.

The previous prime is 4021215130679. The next prime is 4021215130783. The reversal of 4021215130779 is 9770315121204.

It is not a de Polignac number, because 4021215130779 - 2²⁰ = 4021214082203 is a prime.

It is a super-2 number, since 2×4021215130779² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4021215130779.

It is not an unprimeable number, because it can be changed into a prime (4021215130679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1754014 + ... + 3334515.

It is an arithmetic number, because the mean of its divisors is an integer number (140769093920).

Almost surely, 2^{4021215130779} is an apocalyptic number.

4021215130779 is a deficient number, since it is larger than the sum of its proper divisors (2735701377381).

4021215130779 is a wasteful number, since it uses less digits than its factorization.

4021215130779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088872 (or 5088861 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 4021215130779 in words is "four trillion, twenty-one billion, two hundred fifteen million, one hundred thirty thousand, seven hundred seventy-nine".