4021321039993 has 4 divisors (see below), whose sum is σ = 4022011875748. Its totient is φ = 4020630204240.

The previous prime is 4021321039987. The next prime is 4021321040003. The reversal of 4021321039993 is 3999301231204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2558217910249 + 1463103129744 = 1599443^2 + 1209588^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021321039993 - 2²¹ = 4021318942841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021321039903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345409146 + ... + 345420787.

It is an arithmetic number, because the mean of its divisors is an integer number (1005502968937).

Almost surely, 2^{4021321039993} is an apocalyptic number.

It is an amenable number.

4021321039993 is a deficient number, since it is larger than the sum of its proper divisors (690835755).

4021321039993 is an equidigital number, since it uses as much as digits as its factorization.

4021321039993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690835754.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 4021321039993 in words is "four trillion, twenty-one billion, three hundred twenty-one million, thirty-nine thousand, nine hundred ninety-three".