20200211111221 has 4 divisors (see below), whose sum is σ = 20484721126944. Its totient is φ = 19915701095500.

The previous prime is 20200211111183. The next prime is 20200211111239. The reversal of 20200211111221 is 12211111200202.

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 20200211111221 - 2¹⁷ = 20200210980149 is a prime.

It is a super-2 number, since 2×20200211111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200211111195 and 20200211111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200211111281) 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, 142255007755 + ... + 142255007896.

It is an arithmetic number, because the mean of its divisors is an integer number (5121180281736).

Almost surely, 2^{20200211111221} is an apocalyptic number.

It is an amenable number.

20200211111221 is a deficient number, since it is larger than the sum of its proper divisors (284510015723).

20200211111221 is an equidigital number, since it uses as much as digits as its factorization.

20200211111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284510015722.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20200211111221 its reverse (12211111200202), we get a palindrome (32411322311423).

The spelling of 20200211111221 in words is "twenty trillion, two hundred billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".