21343124293 has 2 divisors, whose sum is σ = 21343124294. Its totient is φ = 21343124292.

The previous prime is 21343124239. The next prime is 21343124357. The reversal of 21343124293 is 39242134312.

Together with previous prime (21343124239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10979477089 + 10363647204 = 104783^2 + 101802^2 .

It is a cyclic number.

It is not a de Polignac number, because 21343124293 - 2¹³ = 21343116101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343124093) 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, 10671562146 + 10671562147.

It is an arithmetic number, because the mean of its divisors is an integer number (10671562147).

Almost surely, 2^21343124293 is an apocalyptic number.

It is an amenable number.

21343124293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343124293 is an equidigital number, since it uses as much as digits as its factorization.

21343124293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The spelling of 21343124293 in words is "twenty-one billion, three hundred forty-three million, one hundred twenty-four thousand, two hundred ninety-three".