1020111210111 has 16 divisors (see below), whose sum is σ = 1554593356800. Its totient is φ = 582868874208.

The previous prime is 1020111210071. The next prime is 1020111210163. The reversal of 1020111210111 is 1110121110201.

It is not a de Polignac number, because 1020111210111 - 2²¹ = 1020109112959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121210111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1916556 + ... + 2390273.

It is an arithmetic number, because the mean of its divisors is an integer number (97162084800).

Almost surely, 2^{1020111210111} is an apocalyptic number.

1020111210111 is a deficient number, since it is larger than the sum of its proper divisors (534482146689).

1020111210111 is a wasteful number, since it uses less digits than its factorization.

1020111210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318118.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1020111210111 its reverse (1110121110201), we get a palindrome (2130232320312).

The spelling of 1020111210111 in words is "one trillion, twenty billion, one hundred eleven million, two hundred ten thousand, one hundred eleven".