102020011111111 has 4 divisors (see below), whose sum is σ = 108021188235312. Its totient is φ = 96018833986912.

The previous prime is 102020011111103. The next prime is 102020011111177. The reversal of 102020011111111 is 111111110020201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102020011111111 - 2³ = 102020011111103 is a prime.

It is a super-2 number, since 2×102020011111111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

102020011111111 is a modest number, since divided by 11111111 gives 1020200 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 102020011111091 and 102020011111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020011114111) 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 in 3 ways as a sum of consecutive naturals, for example, 3000588562075 + ... + 3000588562108.

It is an arithmetic number, because the mean of its divisors is an integer number (27005297058828).

Almost surely, 2^{102020011111111} is an apocalyptic number.

102020011111111 is a deficient number, since it is larger than the sum of its proper divisors (6001177124201).

102020011111111 is an equidigital number, since it uses as much as digits as its factorization.

102020011111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001177124200.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 102020011111111 its reverse (111111110020201), we get a palindrome (213131121131312).

The spelling of 102020011111111 in words is "one hundred two trillion, twenty billion, eleven million, one hundred eleven thousand, one hundred eleven".