21160214642135 has 4 divisors (see below), whose sum is σ = 25392257570568. Its totient is φ = 16928171713704.

The previous prime is 21160214642113. The next prime is 21160214642197. The reversal of 21160214642135 is 53124641206112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21160214642135 - 2⁸ = 21160214641879 is a prime.

It is a super-2 number, since 2×21160214642135² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116021464209 + ... + 2116021464218.

It is an arithmetic number, because the mean of its divisors is an integer number (6348064392642).

Almost surely, 2^{21160214642135} is an apocalyptic number.

21160214642135 is a deficient number, since it is larger than the sum of its proper divisors (4232042928433).

21160214642135 is an equidigital number, since it uses as much as digits as its factorization.

21160214642135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232042928432.

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 21160214642135 its reverse (53124641206112), we get a palindrome (74284855848247).

The spelling of 21160214642135 in words is "twenty-one trillion, one hundred sixty billion, two hundred fourteen million, six hundred forty-two thousand, one hundred thirty-five".