21120441320401 has 4 divisors (see below), whose sum is σ = 21120503828992. Its totient is φ = 21120378811812.

The previous prime is 21120441320347. The next prime is 21120441320411. The reversal of 21120441320401 is 10402314402112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21120441320401 - 2¹⁷ = 21120441189329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120441320411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30744705 + ... + 31424158.

It is an arithmetic number, because the mean of its divisors is an integer number (5280125957248).

Almost surely, 2^{21120441320401} is an apocalyptic number.

It is an amenable number.

21120441320401 is a deficient number, since it is larger than the sum of its proper divisors (62508591).

21120441320401 is an equidigital number, since it uses as much as digits as its factorization.

21120441320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62508590.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21120441320401 its reverse (10402314402112), we get a palindrome (31522755722513).

The spelling of 21120441320401 in words is "twenty-one trillion, one hundred twenty billion, four hundred forty-one million, three hundred twenty thousand, four hundred one".