21321120034401 has 64 divisors (see below), whose sum is σ = 34025605079040. Its totient is φ = 11738222496000.

The previous prime is 21321120034393. The next prime is 21321120034421. The reversal of 21321120034401 is 10443002112312.

It is not a de Polignac number, because 21321120034401 - 2³ = 21321120034393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21321120034421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6597145 + ... + 9282486.

It is an arithmetic number, because the mean of its divisors is an integer number (531650079360).

Almost surely, 2^{21321120034401} is an apocalyptic number.

It is an amenable number.

21321120034401 is a deficient number, since it is larger than the sum of its proper divisors (12704485044639).

21321120034401 is a wasteful number, since it uses less digits than its factorization.

21321120034401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15879758.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21321120034401 its reverse (10443002112312), we get a palindrome (31764122146713).

The spelling of 21321120034401 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty million, thirty-four thousand, four hundred one".