4021331321040 has 80 divisors (see below), whose sum is σ = 13599411385536. Its totient is φ = 974868198400.

The previous prime is 4021331321027. The next prime is 4021331321089. The reversal of 4021331321040 is 401231331204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4021331321040² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4021331321040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761613141 + ... + 761618420.

Almost surely, 2^{4021331321040} is an apocalyptic number.

4021331321040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4021331321040 is an abundant number, since it is smaller than the sum of its proper divisors (9578080064496).

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

4021331321040 is a wasteful number, since it uses less digits than its factorization.

4021331321040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523231588 (or 1523231582 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 4021331321040 its reverse (401231331204), we get a palindrome (4422562652244).

The spelling of 4021331321040 in words is "four trillion, twenty-one billion, three hundred thirty-one million, three hundred twenty-one thousand, forty".