21322503134357 has 2 divisors, whose sum is σ = 21322503134358. Its totient is φ = 21322503134356.

The previous prime is 21322503134351. The next prime is 21322503134407. The reversal of 21322503134357 is 75343130522312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15833069688241 + 5489433446116 = 3979079^2 + 2342954^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322503134357 - 2¹⁰ = 21322503133333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322503134351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661251567178 + 10661251567179.

It is an arithmetic number, because the mean of its divisors is an integer number (10661251567179).

Almost surely, 2^{21322503134357} is an apocalyptic number.

It is an amenable number.

21322503134357 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322503134357 is an equidigital number, since it uses as much as digits as its factorization.

21322503134357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 41.

Adding to 21322503134357 its reverse (75343130522312), we get a palindrome (96665633656669).

The spelling of 21322503134357 in words is "twenty-one trillion, three hundred twenty-two billion, five hundred three million, one hundred thirty-four thousand, three hundred fifty-seven".