21132232716373 has 2 divisors, whose sum is σ = 21132232716374. Its totient is φ = 21132232716372.

The previous prime is 21132232716337. The next prime is 21132232716401. The reversal of 21132232716373 is 37361723223112.

Together with previous prime (21132232716337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20825048521809 + 307184194564 = 4563447^2 + 554242^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132232716373 - 2²¹ = 21132230619221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132232716173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566116358186 + 10566116358187.

It is an arithmetic number, because the mean of its divisors is an integer number (10566116358187).

Almost surely, 2^{21132232716373} is an apocalyptic number.

It is an amenable number.

21132232716373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132232716373 is an equidigital number, since it uses as much as digits as its factorization.

21132232716373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 43.

Adding to 21132232716373 its reverse (37361723223112), we get a palindrome (58493955939485).

The spelling of 21132232716373 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred thirty-two million, seven hundred sixteen thousand, three hundred seventy-three".