4001921795329 has 2 divisors, whose sum is σ = 4001921795330. Its totient is φ = 4001921795328.

The previous prime is 4001921795317. The next prime is 4001921795341. The reversal of 4001921795329 is 9235971291004.

It is a balanced prime because it is at equal distance from previous prime (4001921795317) and next prime (4001921795341).

It can be written as a sum of positive squares in only one way, i.e., 2326067271025 + 1675854524304 = 1525145^2 + 1294548^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001921795329 - 2²³ = 4001913406721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4001921795029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000960897664 + 2000960897665.

It is an arithmetic number, because the mean of its divisors is an integer number (2000960897665).

Almost surely, 2^{4001921795329} is an apocalyptic number.

It is an amenable number.

4001921795329 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001921795329 is an equidigital number, since it uses as much as digits as its factorization.

4001921795329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 4001921795329 in words is "four trillion, one billion, nine hundred twenty-one million, seven hundred ninety-five thousand, three hundred twenty-nine".