21042301024577 has 16 divisors (see below), whose sum is σ = 24423550609920. Its totient is φ = 17756960989248.

The previous prime is 21042301024573. The next prime is 21042301024627. The reversal of 21042301024577 is 77542010324012.

It is a cyclic number.

It is not a de Polignac number, because 21042301024577 - 2² = 21042301024573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21042301024577.

It is not an unprimeable number, because it can be changed into a prime (21042301024573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87709433 + ... + 87949014.

It is an arithmetic number, because the mean of its divisors is an integer number (1526471913120).

Almost surely, 2^{21042301024577} is an apocalyptic number.

It is an amenable number.

21042301024577 is a deficient number, since it is larger than the sum of its proper divisors (3381249585343).

21042301024577 is a wasteful number, since it uses less digits than its factorization.

21042301024577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175658720.

The product of its (nonzero) digits is 94080, while the sum is 38.

Adding to 21042301024577 its reverse (77542010324012), we get a palindrome (98584311348589).

The spelling of 21042301024577 in words is "twenty-one trillion, forty-two billion, three hundred one million, twenty-four thousand, five hundred seventy-seven".