21375055642011 has 8 divisors (see below), whose sum is σ = 28681603324944. Its totient is φ = 14159272526880.

The previous prime is 21375055642009. The next prime is 21375055642027. The reversal of 21375055642011 is 11024655057312.

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

It is not a de Polignac number, because 21375055642011 - 2¹ = 21375055642009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21375055642001) 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, 22691141400 + ... + 22691142341.

It is an arithmetic number, because the mean of its divisors is an integer number (3585200415618).

Almost surely, 2^{21375055642011} is an apocalyptic number.

21375055642011 is a deficient number, since it is larger than the sum of its proper divisors (7306547682933).

21375055642011 is a wasteful number, since it uses less digits than its factorization.

21375055642011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45382283901.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 21375055642011 in words is "twenty-one trillion, three hundred seventy-five billion, fifty-five million, six hundred forty-two thousand, eleven".