21404155341111 has 8 divisors (see below), whose sum is σ = 28542618586224. Its totient is φ = 14267564495040.

The previous prime is 21404155341091. The next prime is 21404155341169. The reversal of 21404155341111 is 11114355140412.

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

It is not a de Polignac number, because 21404155341111 - 2¹⁹ = 21404154816823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404155361111) 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, 468073086 + ... + 468118811.

It is an arithmetic number, because the mean of its divisors is an integer number (3567827323278).

Almost surely, 2^{21404155341111} is an apocalyptic number.

21404155341111 is a deficient number, since it is larger than the sum of its proper divisors (7138463245113).

21404155341111 is an equidigital number, since it uses as much as digits as its factorization.

21404155341111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936199521.

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

The spelling of 21404155341111 in words is "twenty-one trillion, four hundred four billion, one hundred fifty-five million, three hundred forty-one thousand, one hundred eleven".