21002101193 has 8 divisors (see below), whose sum is σ = 22110211200. Its totient is φ = 19894264848.

The previous prime is 21002101181. The next prime is 21002101249. The reversal of 21002101193 is 39110120012.

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 21002101193 - 2⁴ = 21002101177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002101493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99743 + ... + 227931.

It is an arithmetic number, because the mean of its divisors is an integer number (2763776400).

Almost surely, 2^21002101193 is an apocalyptic number.

It is an amenable number.

21002101193 is a deficient number, since it is larger than the sum of its proper divisors (1108110007).

21002101193 is a wasteful number, since it uses less digits than its factorization.

21002101193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136831.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 21002101193 in words is "twenty-one billion, two million, one hundred one thousand, one hundred ninety-three".