20102220112021 has 16 divisors (see below), whose sum is σ = 21142734981120. Its totient is φ = 19087469685360.

The previous prime is 20102220112003. The next prime is 20102220112057. The reversal of 20102220112021 is 12021102220102.

It is a happy number.

It is not a de Polignac number, because 20102220112021 - 2¹³ = 20102220103829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102220111986 and 20102220112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102220112081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9550915 + ... + 11464048.

It is an arithmetic number, because the mean of its divisors is an integer number (1321420936320).

Almost surely, 2^{20102220112021} is an apocalyptic number.

It is an amenable number.

20102220112021 is a deficient number, since it is larger than the sum of its proper divisors (1040514869099).

20102220112021 is a wasteful number, since it uses less digits than its factorization.

20102220112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015576.

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

Adding to 20102220112021 its reverse (12021102220102), we get a palindrome (32123322332123).

The spelling of 20102220112021 in words is "twenty trillion, one hundred two billion, two hundred twenty million, one hundred twelve thousand, twenty-one".