20202220220121 has 32 divisors (see below), whose sum is σ = 30035339143040. Its totient is φ = 13420467763200.

The previous prime is 20202220220107. The next prime is 20202220220131. The reversal of 20202220220121 is 12102202220202.

20202220220121 is a `hidden beast` number, since 2 + 0 + 202 + 220 + 220 + 1 + 21 = 666.

It is not a de Polignac number, because 20202220220121 - 2¹⁷ = 20202220089049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202220220094 and 20202220220103.

It is not an unprimeable number, because it can be changed into a prime (20202220220131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8416041 + ... + 10546761.

It is an arithmetic number, because the mean of its divisors is an integer number (938604348220).

Almost surely, 2^{20202220220121} is an apocalyptic number.

It is an amenable number.

20202220220121 is a deficient number, since it is larger than the sum of its proper divisors (9833118922919).

20202220220121 is a wasteful number, since it uses less digits than its factorization.

20202220220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131974 (or 2131968 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20202220220121 its reverse (12102202220202), we get a palindrome (32304422440323).

The spelling of 20202220220121 in words is "twenty trillion, two hundred two billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".