21204606522411 has 192 divisors, whose sum is σ = 34974873722880. Its totient is φ = 12288897331200.

The previous prime is 21204606522377. The next prime is 21204606522413. The reversal of 21204606522411 is 11422560640212.

21204606522411 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 4 + 606 + 5 + 2 + 2 + 41 + 1 = 666.

It is not a de Polignac number, because 21204606522411 - 2⁷ = 21204606522283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21204606522413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11631708646 + ... + 11631710468.

It is an arithmetic number, because the mean of its divisors is an integer number (182160800640).

Almost surely, 2^{21204606522411} is an apocalyptic number.

21204606522411 is a deficient number, since it is larger than the sum of its proper divisors (13770267200469).

21204606522411 is a wasteful number, since it uses less digits than its factorization.

21204606522411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 21204606522411 in words is "twenty-one trillion, two hundred four billion, six hundred six million, five hundred twenty-two thousand, four hundred eleven".