20202222112221 has 16 divisors (see below), whose sum is σ = 27730015154048. Its totient is φ = 13073017809600.

The previous prime is 20202222112199. The next prime is 20202222112283. The reversal of 20202222112221 is 12221122220202.

It is not a de Polignac number, because 20202222112221 - 2²³ = 20202213723613 is a prime.

It is a super-2 number, since 2×20202222112221² (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 (20202222112021) 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, 216107665 + ... + 216201126.

It is an arithmetic number, because the mean of its divisors is an integer number (1733125947128).

Almost surely, 2^{20202222112221} is an apocalyptic number.

It is an amenable number.

20202222112221 is a deficient number, since it is larger than the sum of its proper divisors (7527793041827).

20202222112221 is a wasteful number, since it uses less digits than its factorization.

20202222112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432309252.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20202222112221 its reverse (12221122220202), we get a palindrome (32423344332423).

The spelling of 20202222112221 in words is "twenty trillion, two hundred two billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".