1020220111111 has 2 divisors, whose sum is σ = 1020220111112. Its totient is φ = 1020220111110.

The previous prime is 1020220111037. The next prime is 1020220111117. The reversal of 1020220111111 is 1111110220201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020220111111 - 2²¹ = 1020218013959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020220111091 and 1020220111100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020220111117) 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, 510110055555 + 510110055556.

It is an arithmetic number, because the mean of its divisors is an integer number (510110055556).

Almost surely, 2^{1020220111111} is an apocalyptic number.

1020220111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020220111111 is an equidigital number, since it uses as much as digits as its factorization.

1020220111111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1020220111111 its reverse (1111110220201), we get a palindrome (2131330331312).

The spelling of 1020220111111 in words is "one trillion, twenty billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".