21153204145511 has 8 divisors (see below), whose sum is σ = 21500166529248. Its totient is φ = 20806247844000.

The previous prime is 21153204145459. The next prime is 21153204145537. The reversal of 21153204145511 is 11554140235112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21153204145511 is a prime.

It is a super-2 number, since 2×21153204145511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153204175511) 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, 5777126 + ... + 8699516.

It is an arithmetic number, because the mean of its divisors is an integer number (2687520816156).

Almost surely, 2^{21153204145511} is an apocalyptic number.

21153204145511 is a deficient number, since it is larger than the sum of its proper divisors (346962383737).

21153204145511 is a wasteful number, since it uses less digits than its factorization.

21153204145511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041113.

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 21153204145511 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred four million, one hundred forty-five thousand, five hundred eleven".