21355602411 has 32 divisors (see below), whose sum is σ = 33479147520. Its totient is φ = 11937542400.

The previous prime is 21355602409. The next prime is 21355602413. The reversal of 21355602411 is 11420655312.

It is an interprime number because it is at equal distance from previous prime (21355602409) and next prime (21355602413).

It is not a de Polignac number, because 21355602411 - 2¹ = 21355602409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21355602413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529231 + ... + 568151.

It is an arithmetic number, because the mean of its divisors is an integer number (1046223360).

Almost surely, 2^21355602411 is an apocalyptic number.

21355602411 is a deficient number, since it is larger than the sum of its proper divisors (12123545109).

21355602411 is a wasteful number, since it uses less digits than its factorization.

21355602411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40227.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 21355602411 in words is "twenty-one billion, three hundred fifty-five million, six hundred two thousand, four hundred eleven".