21331012322205 has 32 divisors (see below), whose sum is σ = 37935747302400. Its totient is φ = 11372355619776.

The previous prime is 21331012322089. The next prime is 21331012322209. The reversal of 21331012322205 is 50222321013312.

21331012322205 is a `hidden beast` number, since 2 + 1 + 3 + 310 + 1 + 2 + 322 + 20 + 5 = 666.

It is not a de Polignac number, because 21331012322205 - 2²² = 21331008127901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331012322209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28689114 + ... + 29423243.

It is an arithmetic number, because the mean of its divisors is an integer number (1185492103200).

Almost surely, 2^{21331012322205} is an apocalyptic number.

It is an amenable number.

21331012322205 is a deficient number, since it is larger than the sum of its proper divisors (16604734980195).

21331012322205 is a wasteful number, since it uses less digits than its factorization.

21331012322205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58115090 (or 58115084 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21331012322205 its reverse (50222321013312), we get a palindrome (71553333335517).

The spelling of 21331012322205 in words is "twenty-one trillion, three hundred thirty-one billion, twelve million, three hundred twenty-two thousand, two hundred five".