21152543141 has 2 divisors, whose sum is σ = 21152543142. Its totient is φ = 21152543140.

The previous prime is 21152543077. The next prime is 21152543171. The reversal of 21152543141 is 14134525112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19350201025 + 1802342116 = 139105^2 + 42454^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152543141 - 2⁶ = 21152543077 is a prime.

It is a super-2 number, since 2×21152543141² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21152543171) 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, 10576271570 + 10576271571.

It is an arithmetic number, because the mean of its divisors is an integer number (10576271571).

Almost surely, 2^21152543141 is an apocalyptic number.

It is an amenable number.

21152543141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152543141 is an equidigital number, since it uses as much as digits as its factorization.

21152543141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

The spelling of 21152543141 in words is "twenty-one billion, one hundred fifty-two million, five hundred forty-three thousand, one hundred forty-one".