21402312041322 has 24 divisors (see below), whose sum is σ = 46448833643940. Its totient is φ = 7122233620800.

The previous prime is 21402312041311. The next prime is 21402312041329. The reversal of 21402312041322 is 22314021320412.

21402312041322 is a `hidden beast` number, since 2 + 1 + 402 + 3 + 120 + 4 + 132 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21378703411521 + 23608629801 = 4623711^2 + 153651^2 .

It is not an unprimeable number, because it can be changed into a prime (21402312041329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 989188297 + ... + 989209932.

Almost surely, 2^{21402312041322} is an apocalyptic number.

21402312041322 is an abundant number, since it is smaller than the sum of its proper divisors (25046521602618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21402312041322 is a wasteful number, since it uses less digits than its factorization.

21402312041322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978398838 (or 1978398835 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21402312041322 its reverse (22314021320412), we get a palindrome (43716333361734).

The spelling of 21402312041322 in words is "twenty-one trillion, four hundred two billion, three hundred twelve million, forty-one thousand, three hundred twenty-two".