111020021071 has 2 divisors, whose sum is σ = 111020021072. Its totient is φ = 111020021070.

The previous prime is 111020021069. The next prime is 111020021153. The reversal of 111020021071 is 170120020111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111020021071 - 2¹ = 111020021069 is a prime.

Together with 111020021069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020021771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510010535 + 55510010536.

It is an arithmetic number, because the mean of its divisors is an integer number (55510010536).

Almost surely, 2^111020021071 is an apocalyptic number.

111020021071 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020021071 is an equidigital number, since it uses as much as digits as its factorization.

111020021071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 111020021071 its reverse (170120020111), we get a palindrome (281140041182).

The spelling of 111020021071 in words is "one hundred eleven billion, twenty million, twenty-one thousand, seventy-one".