21320406634111 has 8 divisors (see below), whose sum is σ = 23752177152480. Its totient is φ = 19001741721312.

The previous prime is 21320406634097. The next prime is 21320406634127. The reversal of 21320406634111 is 11143660402312.

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

It is a cyclic number.

It is not a de Polignac number, because 21320406634111 - 2¹⁹ = 21320406109823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320406634811) 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 7 ways as a sum of consecutive naturals, for example, 28276400995 + ... + 28276401748.

It is an arithmetic number, because the mean of its divisors is an integer number (2969022144060).

Almost surely, 2^{21320406634111} is an apocalyptic number.

21320406634111 is a deficient number, since it is larger than the sum of its proper divisors (2431770518369).

21320406634111 is a wasteful number, since it uses less digits than its factorization.

21320406634111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56552802785.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21320406634111 in words is "twenty-one trillion, three hundred twenty billion, four hundred six million, six hundred thirty-four thousand, one hundred eleven".