1020011111 has 16 divisors (see below), whose sum is σ = 1189339200. Its totient is φ = 856762368.

The previous prime is 1020011093. The next prime is 1020011123. The reversal of 1020011111 is 1111100201.

It is a happy number.

1020011111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1020011111 is a prime.

1020011111 is a modest number, since divided by 11111 gives 10200 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011141) 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, 63155 + ... + 77643.

It is an arithmetic number, because the mean of its divisors is an integer number (74333700).

Almost surely, 2^1020011111 is an apocalyptic number.

1020011111 is a deficient number, since it is larger than the sum of its proper divisors (169328089).

1020011111 is a wasteful number, since it uses less digits than its factorization.

1020011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14698.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1020011111 is about 31937.6127943214. The cubic root of 1020011111 is about 1006.6263646400.

Adding to 1020011111 its reverse (1111100201), we get a palindrome (2131111312).

The spelling of 1020011111 in words is "one billion, twenty million, eleven thousand, one hundred eleven".