21158388125211 has 8 divisors (see below), whose sum is σ = 28743470660880. Its totient is φ = 13839448836512.

The previous prime is 21158388125141. The next prime is 21158388125219. The reversal of 21158388125211 is 11252188385112.

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 21158388125211 - 2¹¹ = 21158388123163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21158388125219) 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, 66535811556 + ... + 66535811873.

It is an arithmetic number, because the mean of its divisors is an integer number (3592933832610).

Almost surely, 2^{21158388125211} is an apocalyptic number.

21158388125211 is a deficient number, since it is larger than the sum of its proper divisors (7585082535669).

21158388125211 is a wasteful number, since it uses less digits than its factorization.

21158388125211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133071623485.

The product of its digits is 307200, while the sum is 48.

The spelling of 21158388125211 in words is "twenty-one trillion, one hundred fifty-eight billion, three hundred eighty-eight million, one hundred twenty-five thousand, two hundred eleven".