20020021012111 has 2 divisors, whose sum is σ = 20020021012112. Its totient is φ = 20020021012110.

The previous prime is 20020021012087. The next prime is 20020021012177. The reversal of 20020021012111 is 11121012002002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20020021012111 - 2¹³ = 20020021003919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020021012091 and 20020021012100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020021019111) 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, 10010010506055 + 10010010506056.

It is an arithmetic number, because the mean of its divisors is an integer number (10010010506056).

Almost surely, 2^{20020021012111} is an apocalyptic number.

20020021012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020021012111 is an equidigital number, since it uses as much as digits as its factorization.

20020021012111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20020021012111 its reverse (11121012002002), we get a palindrome (31141033014113).

The spelling of 20020021012111 in words is "twenty trillion, twenty billion, twenty-one million, twelve thousand, one hundred eleven".