21155142334024 has 32 divisors (see below), whose sum is σ = 41754013012800. Its totient is φ = 10020750667200.

The previous prime is 21155142334003. The next prime is 21155142334033. The reversal of 21155142334024 is 42043324155112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14708574 + ... + 16082674.

It is an arithmetic number, because the mean of its divisors is an integer number (1304812906650).

Almost surely, 2^{21155142334024} is an apocalyptic number.

It is an amenable number.

21155142334024 is a deficient number, since it is larger than the sum of its proper divisors (20598870678776).

21155142334024 is a wasteful number, since it uses less digits than its factorization.

21155142334024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475413 (or 1475409 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 21155142334024 its reverse (42043324155112), we get a palindrome (63198466489136).

The spelling of 21155142334024 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-two million, three hundred thirty-four thousand, twenty-four".