21155200131053 has 8 divisors (see below), whose sum is σ = 21500401032000. Its totient is φ = 20812388164128.

The previous prime is 21155200131001. The next prime is 21155200131059. The reversal of 21155200131053 is 35013100255112.

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 21155200131053 - 2²⁰ = 21155199082477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155200131059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597215651 + ... + 597251072.

It is an arithmetic number, because the mean of its divisors is an integer number (2687550129000).

Almost surely, 2^{21155200131053} is an apocalyptic number.

It is an amenable number.

21155200131053 is a deficient number, since it is larger than the sum of its proper divisors (345200900947).

21155200131053 is a wasteful number, since it uses less digits than its factorization.

21155200131053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194467011.

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 21155200131053 its reverse (35013100255112), we get a palindrome (56168300386165).

The spelling of 21155200131053 in words is "twenty-one trillion, one hundred fifty-five billion, two hundred million, one hundred thirty-one thousand, fifty-three".