4021331321998 has 16 divisors (see below), whose sum is σ = 6386880756240. Its totient is φ = 1892373307776.

The previous prime is 4021331321989. The next prime is 4021331321999. The reversal of 4021331321998 is 8991231331204.

It is a happy number.

It is a super-2 number, since 2×4021331321998² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021331321999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3518065 + ... + 4518787.

It is an arithmetic number, because the mean of its divisors is an integer number (399180047265).

Almost surely, 2^{4021331321998} is an apocalyptic number.

4021331321998 is a deficient number, since it is larger than the sum of its proper divisors (2365549434242).

4021331321998 is a wasteful number, since it uses less digits than its factorization.

4021331321998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118931.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 4021331321998 in words is "four trillion, twenty-one billion, three hundred thirty-one million, three hundred twenty-one thousand, nine hundred ninety-eight".