20101323200221 has 4 divisors (see below), whose sum is σ = 21159287579200. Its totient is φ = 19043358821244.

The previous prime is 20101323200213. The next prime is 20101323200303. The reversal of 20101323200221 is 12200232310102.

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 20101323200221 - 2³ = 20101323200213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1057964378959 = 20101323200221 / (2 + 0 + 1 + 0 + 1 + 3 + 2 + 3 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101323200921) 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, 528982189461 + ... + 528982189498.

It is an arithmetic number, because the mean of its divisors is an integer number (5289821894800).

Almost surely, 2^{20101323200221} is an apocalyptic number.

It is an amenable number.

20101323200221 is a deficient number, since it is larger than the sum of its proper divisors (1057964378979).

20101323200221 is a wasteful number, since it uses less digits than its factorization.

20101323200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057964378978.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20101323200221 its reverse (12200232310102), we get a palindrome (32301555510323).

The spelling of 20101323200221 in words is "twenty trillion, one hundred one billion, three hundred twenty-three million, two hundred thousand, two hundred twenty-one".