21133012523055 has 64 divisors (see below), whose sum is σ = 34455862425600. Its totient is φ = 11058267225600.

The previous prime is 21133012523027. The next prime is 21133012523081. The reversal of 21133012523055 is 55032521033112.

It is not a de Polignac number, because 21133012523055 - 2⁵ = 21133012523023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 183072246 + ... + 183187644.

It is an arithmetic number, because the mean of its divisors is an integer number (538372850400).

Almost surely, 2^{21133012523055} is an apocalyptic number.

21133012523055 is a deficient number, since it is larger than the sum of its proper divisors (13322849902545).

21133012523055 is a wasteful number, since it uses less digits than its factorization.

21133012523055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116312.

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 21133012523055 its reverse (55032521033112), we get a palindrome (76165533556167).

The spelling of 21133012523055 in words is "twenty-one trillion, one hundred thirty-three billion, twelve million, five hundred twenty-three thousand, fifty-five".