21152334251411 has 4 divisors (see below), whose sum is σ = 23075273728824. Its totient is φ = 19229394774000.

The previous prime is 21152334251407. The next prime is 21152334251413. The reversal of 21152334251411 is 11415243325112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21152334251411 - 2² = 21152334251407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152334251413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961469738690 + ... + 961469738711.

It is an arithmetic number, because the mean of its divisors is an integer number (5768818432206).

Almost surely, 2^{21152334251411} is an apocalyptic number.

21152334251411 is a deficient number, since it is larger than the sum of its proper divisors (1922939477413).

21152334251411 is a wasteful number, since it uses less digits than its factorization.

21152334251411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922939477412.

The product of its digits is 28800, while the sum is 35.

Adding to 21152334251411 its reverse (11415243325112), we get a palindrome (32567577576523).

The spelling of 21152334251411 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-four million, two hundred fifty-one thousand, four hundred eleven".