20202111112021 has 2 divisors, whose sum is σ = 20202111112022. Its totient is φ = 20202111112020.

The previous prime is 20202111111991. The next prime is 20202111112033. The reversal of 20202111112021 is 12021111120202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18962663088996 + 1239448023025 = 4354614^2 + 1113305^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202111112021 - 2¹⁷ = 20202110980949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202111111986 and 20202111112004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202111112061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101055556010 + 10101055556011.

It is an arithmetic number, because the mean of its divisors is an integer number (10101055556011).

Almost surely, 2^{20202111112021} is an apocalyptic number.

It is an amenable number.

20202111112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202111112021 is an equidigital number, since it uses as much as digits as its factorization.

20202111112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20202111112021 its reverse (12021111120202), we get a palindrome (32223222232223).

The spelling of 20202111112021 in words is "twenty trillion, two hundred two billion, one hundred eleven million, one hundred twelve thousand, twenty-one".