102111001011 has 12 divisors (see below), whose sum is σ = 147931339192. Its totient is φ = 67871998656.

The previous prime is 102111000991. The next prime is 102111001021. The reversal of 102111001011 is 110100111201.

It is not a de Polignac number, because 102111001011 - 2³¹ = 99963517363 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102111000984 and 102111001002.

It is not an unprimeable number, because it can be changed into a prime (102111001021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16830301 + ... + 16836366.

Almost surely, 2^102111001011 is an apocalyptic number.

102111001011 is a deficient number, since it is larger than the sum of its proper divisors (45820338181).

102111001011 is a wasteful number, since it uses less digits than its factorization.

102111001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33667010 (or 33667007 counting only the distinct ones).

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

Adding to 102111001011 its reverse (110100111201), we get a palindrome (212211112212).

The spelling of 102111001011 in words is "one hundred two billion, one hundred eleven million, one thousand, eleven".