21321048380353 has 2 divisors, whose sum is σ = 21321048380354. Its totient is φ = 21321048380352.

The previous prime is 21321048380341. The next prime is 21321048380363. The reversal of 21321048380353 is 35308384012312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14922637658289 + 6398410722064 = 3862983^2 + 2529508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21321048380353 is a prime.

It is not a weakly prime, because it can be changed into another prime (21321048380323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660524190176 + 10660524190177.

It is an arithmetic number, because the mean of its divisors is an integer number (10660524190177).

Almost surely, 2^{21321048380353} is an apocalyptic number.

It is an amenable number.

21321048380353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321048380353 is an equidigital number, since it uses as much as digits as its factorization.

21321048380353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 21321048380353 in words is "twenty-one trillion, three hundred twenty-one billion, forty-eight million, three hundred eighty thousand, three hundred fifty-three".