102111020011 has 24 divisors (see below), whose sum is σ = 137853425664. Its totient is φ = 73446478560.

The previous prime is 102111019981. The next prime is 102111020017. The reversal of 102111020011 is 110020111201.

It is a de Polignac number, because none of the positive numbers 2^k-102111020011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102111020011.

It is not an unprimeable number, because it can be changed into a prime (102111020017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3910411 + ... + 3936436.

It is an arithmetic number, because the mean of its divisors is an integer number (5743892736).

Almost surely, 2^102111020011 is an apocalyptic number.

102111020011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102111020011 is a deficient number, since it is larger than the sum of its proper divisors (35742405653).

102111020011 is a wasteful number, since it uses less digits than its factorization.

102111020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846891 (or 7846878 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 102111020011 its reverse (110020111201), we get a palindrome (212131131212).

The spelling of 102111020011 in words is "one hundred two billion, one hundred eleven million, twenty thousand, eleven".