20202022222221 has 16 divisors (see below), whose sum is σ = 30883017904128. Its totient is φ = 11506893682800.

The previous prime is 20202022222189. The next prime is 20202022222223. The reversal of 20202022222221 is 12222222020202.

It is not a de Polignac number, because 20202022222221 - 2⁵ = 20202022222189 is a prime.

It is a super-2 number, since 2×20202022222221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202022222223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546618965 + ... + 1546632026.

It is an arithmetic number, because the mean of its divisors is an integer number (1930188619008).

Almost surely, 2^{20202022222221} is an apocalyptic number.

20202022222221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20202022222221 is a deficient number, since it is larger than the sum of its proper divisors (10680995681907).

20202022222221 is a wasteful number, since it uses less digits than its factorization.

20202022222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093251312.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20202022222221 its reverse (12222222020202), we get a palindrome (32424244242423).

The spelling of 20202022222221 in words is "twenty trillion, two hundred two billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".