21160252041 has 4 divisors (see below), whose sum is σ = 28213669392. Its totient is φ = 14106834692.

The previous prime is 21160252033. The next prime is 21160252073. The reversal of 21160252041 is 14025206112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21160252041 - 2³ = 21160252033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21160252021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3526708671 + ... + 3526708676.

It is an arithmetic number, because the mean of its divisors is an integer number (7053417348).

Almost surely, 2^21160252041 is an apocalyptic number.

It is an amenable number.

21160252041 is a deficient number, since it is larger than the sum of its proper divisors (7053417351).

21160252041 is an equidigital number, since it uses as much as digits as its factorization.

21160252041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7053417350.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21160252041 its reverse (14025206112), we get a palindrome (35185458153).

The spelling of 21160252041 in words is "twenty-one billion, one hundred sixty million, two hundred fifty-two thousand, forty-one".