21032053243 has 2 divisors, whose sum is σ = 21032053244. Its totient is φ = 21032053242.

The previous prime is 21032053241. The next prime is 21032053247. The reversal of 21032053243 is 34235023012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21032053243 - 2¹ = 21032053241 is a prime.

Together with 21032053241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21032053241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516026621 + 10516026622.

It is an arithmetic number, because the mean of its divisors is an integer number (10516026622).

Almost surely, 2^21032053243 is an apocalyptic number.

21032053243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032053243 is an equidigital number, since it uses as much as digits as its factorization.

21032053243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21032053243 its reverse (34235023012), we get a palindrome (55267076255).

The spelling of 21032053243 in words is "twenty-one billion, thirty-two million, fifty-three thousand, two hundred forty-three".