1020202111111 has 2 divisors, whose sum is σ = 1020202111112. Its totient is φ = 1020202111110.

The previous prime is 1020202111099. The next prime is 1020202111129. The reversal of 1020202111111 is 1111112020201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111112020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020202111111 - 2¹¹ = 1020202109063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020202111091 and 1020202111100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020202111711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510101055555 + 510101055556.

It is an arithmetic number, because the mean of its divisors is an integer number (510101055556).

Almost surely, 2^{1020202111111} is an apocalyptic number.

1020202111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020202111111 is an equidigital number, since it uses as much as digits as its factorization.

1020202111111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1020202111111 its reverse (1111112020201), we get a palindrome (2131314131312).

The spelling of 1020202111111 in words is "one trillion, twenty billion, two hundred two million, one hundred eleven thousand, one hundred eleven".