21442332402001 has 6 divisors (see below), whose sum is σ = 24943121365650. Its totient is φ = 18379142058816.

The previous prime is 21442332401983. The next prime is 21442332402059. The reversal of 21442332402001 is 10020423324412.

It can be written as a sum of positive squares in only one way, i.e., 19219105281600 + 2223227120401 = 4383960^2 + 1491049^2 .

It is not a de Polignac number, because 21442332402001 - 2¹³ = 21442332393809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442332402091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218799310176 + ... + 218799310273.

It is an arithmetic number, because the mean of its divisors is an integer number (4157186894275).

Almost surely, 2^{21442332402001} is an apocalyptic number.

It is an amenable number.

21442332402001 is a deficient number, since it is larger than the sum of its proper divisors (3500788963649).

21442332402001 is an equidigital number, since it uses as much as digits as its factorization.

21442332402001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437598620463 (or 437598620456 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21442332402001 its reverse (10020423324412), we get a palindrome (31462755726413).

The spelling of 21442332402001 in words is "twenty-one trillion, four hundred forty-two billion, three hundred thirty-two million, four hundred two thousand, one".