20202021220111 has 4 divisors (see below), whose sum is σ = 20202087682872. Its totient is φ = 20201954757352.

The previous prime is 20202021220099. The next prime is 20202021220133. The reversal of 20202021220111 is 11102212020202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20202021220111 - 2⁷ = 20202021219983 is a prime.

It is a super-2 number, since 2×20202021220111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202021220211) 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, 32773336 + ... + 33384061.

It is an arithmetic number, because the mean of its divisors is an integer number (5050521920718).

Almost surely, 2^{20202021220111} is an apocalyptic number.

20202021220111 is a deficient number, since it is larger than the sum of its proper divisors (66462761).

20202021220111 is an equidigital number, since it uses as much as digits as its factorization.

20202021220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66462760.

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

Adding to 20202021220111 its reverse (11102212020202), we get a palindrome (31304233240313).

The spelling of 20202021220111 in words is "twenty trillion, two hundred two billion, twenty-one million, two hundred twenty thousand, one hundred eleven".