21152341123 has 2 divisors, whose sum is σ = 21152341124. Its totient is φ = 21152341122.

The previous prime is 21152341097. The next prime is 21152341127. The reversal of 21152341123 is 32114325112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21152341123 - 2³³ = 12562406531 is a prime.

It is a super-2 number, since 2×21152341123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21152341127) 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, 10576170561 + 10576170562.

It is an arithmetic number, because the mean of its divisors is an integer number (10576170562).

Almost surely, 2^21152341123 is an apocalyptic number.

21152341123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152341123 is an equidigital number, since it uses as much as digits as its factorization.

21152341123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

Adding to 21152341123 its reverse (32114325112), we get a palindrome (53266666235).

The spelling of 21152341123 in words is "twenty-one billion, one hundred fifty-two million, three hundred forty-one thousand, one hundred twenty-three".