4021212578736 has 40 divisors (see below), whose sum is σ = 10388540561584. Its totient is φ = 1340351539200.

The previous prime is 4021212578731. The next prime is 4021212578767. The reversal of 4021212578736 is 6378752121204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (4021212578731) 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, 401065 + ... + 2864136.

Almost surely, 2^{4021212578736} is an apocalyptic number.

It is an amenable number.

4021212578736 is an abundant number, since it is smaller than the sum of its proper divisors (6367327982848).

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

4021212578736 is a wasteful number, since it uses less digits than its factorization.

4021212578736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290869 (or 3290863 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 4021212578736 in words is "four trillion, twenty-one billion, two hundred twelve million, five hundred seventy-eight thousand, seven hundred thirty-six".