21132321293 has 2 divisors, whose sum is σ = 21132321294. Its totient is φ = 21132321292.

The previous prime is 21132321281. The next prime is 21132321307. The reversal of 21132321293 is 39212323112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21047626084 + 84695209 = 145078^2 + 9203^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132321293 - 2¹⁴ = 21132304909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132324293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566160646 + 10566160647.

It is an arithmetic number, because the mean of its divisors is an integer number (10566160647).

Almost surely, 2^21132321293 is an apocalyptic number.

It is an amenable number.

21132321293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132321293 is an equidigital number, since it uses as much as digits as its factorization.

21132321293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The spelling of 21132321293 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-one thousand, two hundred ninety-three".