21142311135215 has 48 divisors (see below), whose sum is σ = 27449894839680. Its totient is φ = 15626544660480.

The previous prime is 21142311135193. The next prime is 21142311135221. The reversal of 21142311135215 is 51253111324112.

It is a de Polignac number, because none of the positive numbers 2^k-21142311135215 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19213535 + ... + 20284095.

It is an arithmetic number, because the mean of its divisors is an integer number (571872809160).

Almost surely, 2^{21142311135215} is an apocalyptic number.

21142311135215 is a deficient number, since it is larger than the sum of its proper divisors (6307583704465).

21142311135215 is a wasteful number, since it uses less digits than its factorization.

21142311135215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070852 (or 1070835 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

Adding to 21142311135215 its reverse (51253111324112), we get a palindrome (72395422459327).

The spelling of 21142311135215 in words is "twenty-one trillion, one hundred forty-two billion, three hundred eleven million, one hundred thirty-five thousand, two hundred fifteen".