1020100011111 has 16 divisors (see below), whose sum is σ = 1590799238400. Its totient is φ = 644273690904.

The previous prime is 1020100011103. The next prime is 1020100011181. The reversal of 1020100011111 is 1111100010201.

It is not a de Polignac number, because 1020100011111 - 2³ = 1020100011103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1020100011093 and 1020100011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020100011181) 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, 994249011 + ... + 994250036.

It is an arithmetic number, because the mean of its divisors is an integer number (99424952400).

Almost surely, 2^{1020100011111} is an apocalyptic number.

1020100011111 is a deficient number, since it is larger than the sum of its proper divisors (570699227289).

1020100011111 is a wasteful number, since it uses less digits than its factorization.

1020100011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988499075 (or 1988499069 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1020100011111 its reverse (1111100010201), we get a palindrome (2131200021312).

The spelling of 1020100011111 in words is "one trillion, twenty billion, one hundred million, eleven thousand, one hundred eleven".