21124153352411 has 4 divisors (see below), whose sum is σ = 21196249439232. Its totient is φ = 21052057265592.

The previous prime is 21124153352389. The next prime is 21124153352453. The reversal of 21124153352411 is 11425335142112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124153352411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21124153352711) 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, 36048042971 + ... + 36048043556.

It is an arithmetic number, because the mean of its divisors is an integer number (5299062359808).

Almost surely, 2^{21124153352411} is an apocalyptic number.

21124153352411 is a deficient number, since it is larger than the sum of its proper divisors (72096086821).

21124153352411 is an equidigital number, since it uses as much as digits as its factorization.

21124153352411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72096086820.

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

Adding to 21124153352411 its reverse (11425335142112), we get a palindrome (32549488494523).

The spelling of 21124153352411 in words is "twenty-one trillion, one hundred twenty-four billion, one hundred fifty-three million, three hundred fifty-two thousand, four hundred eleven".