21211104304454 has 8 divisors (see below), whose sum is σ = 31816781999208. Its totient is φ = 10605510304720.

The previous prime is 21211104304361. The next prime is 21211104304469. The reversal of 21211104304454 is 45440340111212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21211104304454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20286287 + ... + 21306234.

It is an arithmetic number, because the mean of its divisors is an integer number (3977097749901).

Almost surely, 2^{21211104304454} is an apocalyptic number.

21211104304454 is a deficient number, since it is larger than the sum of its proper divisors (10605677694754).

21211104304454 is a wasteful number, since it uses less digits than its factorization.

21211104304454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41847510.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 21211104304454 its reverse (45440340111212), we get a palindrome (66651444415666).

The spelling of 21211104304454 in words is "twenty-one trillion, two hundred eleven billion, one hundred four million, three hundred four thousand, four hundred fifty-four".