21123100300201 has 4 divisors (see below), whose sum is σ = 21140895668112. Its totient is φ = 21105304932292.

The previous prime is 21123100300193. The next prime is 21123100300319. The reversal of 21123100300201 is 10200300132112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21123100300201 - 2³ = 21123100300193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123100300901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8897682175 + ... + 8897684548.

It is an arithmetic number, because the mean of its divisors is an integer number (5285223917028).

Almost surely, 2^{21123100300201} is an apocalyptic number.

It is an amenable number.

21123100300201 is a deficient number, since it is larger than the sum of its proper divisors (17795367911).

21123100300201 is a wasteful number, since it uses less digits than its factorization.

21123100300201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17795367910.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21123100300201 its reverse (10200300132112), we get a palindrome (31323400432313).

The spelling of 21123100300201 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred million, three hundred thousand, two hundred one".