21202129393 has 8 divisors (see below), whose sum is σ = 22321353600. Its totient is φ = 20083237488.

The previous prime is 21202129391. The next prime is 21202129433. The reversal of 21202129393 is 39392120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202129393 - 2¹ = 21202129391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202129391) by changing a digit.

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, 53688 + ... + 212806.

It is an arithmetic number, because the mean of its divisors is an integer number (2790169200).

Almost surely, 2^21202129393 is an apocalyptic number.

It is an amenable number.

21202129393 is a deficient number, since it is larger than the sum of its proper divisors (1119224207).

21202129393 is a wasteful number, since it uses less digits than its factorization.

21202129393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166151.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 21202129393 in words is "twenty-one billion, two hundred two million, one hundred twenty-nine thousand, three hundred ninety-three".