2001002432521 has 2 divisors, whose sum is σ = 2001002432522. Its totient is φ = 2001002432520.

The previous prime is 2001002432501. The next prime is 2001002432543. The reversal of 2001002432521 is 1252342001002.

It is a happy number.

It is an a-pointer prime, because the next prime (2001002432543) can be obtained adding 2001002432521 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118644675600 + 882357756921 = 1057660^2 + 939339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001002432521 - 2¹³ = 2001002424329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001002432492 and 2001002432501.

It is not a weakly prime, because it can be changed into another prime (2001002432501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000501216260 + 1000501216261.

It is an arithmetic number, because the mean of its divisors is an integer number (1000501216261).

Almost surely, 2^{2001002432521} is an apocalyptic number.

It is an amenable number.

2001002432521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001002432521 is an equidigital number, since it uses as much as digits as its factorization.

2001002432521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 2001002432521 its reverse (1252342001002), we get a palindrome (3253344433523).

The spelling of 2001002432521 in words is "two trillion, one billion, two million, four hundred thirty-two thousand, five hundred twenty-one".