21611125504401 has 8 divisors (see below), whose sum is σ = 28816465812960. Its totient is φ = 14406601099392.

The previous prime is 21611125504399. The next prime is 21611125504457. The reversal of 21611125504401 is 10440552111612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21611125504401 - 2¹ = 21611125504399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21611125504301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203914080 + ... + 204020033.

It is an arithmetic number, because the mean of its divisors is an integer number (3602058226620).

Almost surely, 2^{21611125504401} is an apocalyptic number.

It is an amenable number.

21611125504401 is a deficient number, since it is larger than the sum of its proper divisors (7205340308559).

21611125504401 is a wasteful number, since it uses less digits than its factorization.

21611125504401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407951775.

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 21611125504401 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-five million, five hundred four thousand, four hundred one".