21313110135 has 16 divisors (see below), whose sum is σ = 34167984480. Its totient is φ = 11344656000.

The previous prime is 21313110061. The next prime is 21313110167. The reversal of 21313110135 is 53101131312.

It is not a de Polignac number, because 21313110135 - 2¹¹ = 21313108087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1388116 + ... + 1403385.

It is an arithmetic number, because the mean of its divisors is an integer number (2135499030).

Almost surely, 2^21313110135 is an apocalyptic number.

21313110135 is a deficient number, since it is larger than the sum of its proper divisors (12854874345).

21313110135 is a wasteful number, since it uses less digits than its factorization.

21313110135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792018.

The product of its (nonzero) digits is 270, while the sum is 21.

Adding to 21313110135 its reverse (53101131312), we get a palindrome (74414241447).

The spelling of 21313110135 in words is "twenty-one billion, three hundred thirteen million, one hundred ten thousand, one hundred thirty-five".