20111200220221 has 4 divisors (see below), whose sum is σ = 21939491149344. Its totient is φ = 18282909291100.

The previous prime is 20111200220207. The next prime is 20111200220227. The reversal of 20111200220221 is 12202200211102.

It is a happy number.

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 20111200220221 - 2²¹ = 20111198123069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111200220195 and 20111200220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111200220227) 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, 914145464545 + ... + 914145464566.

It is an arithmetic number, because the mean of its divisors is an integer number (5484872787336).

Almost surely, 2^{20111200220221} is an apocalyptic number.

It is an amenable number.

20111200220221 is a deficient number, since it is larger than the sum of its proper divisors (1828290929123).

20111200220221 is a wasteful number, since it uses less digits than its factorization.

20111200220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828290929122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20111200220221 its reverse (12202200211102), we get a palindrome (32313400431323).

The spelling of 20111200220221 in words is "twenty trillion, one hundred eleven billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".