102120111011 has 2 divisors, whose sum is σ = 102120111012. Its totient is φ = 102120111010.

The previous prime is 102120110909. The next prime is 102120111151. The reversal of 102120111011 is 110111021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120111011 - 2¹⁴ = 102120094627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102120110983 and 102120111001.

It is not a weakly prime, because it can be changed into another prime (102120111811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060055505 + 51060055506.

It is an arithmetic number, because the mean of its divisors is an integer number (51060055506).

Almost surely, 2^102120111011 is an apocalyptic number.

102120111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120111011 is an equidigital number, since it uses as much as digits as its factorization.

102120111011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102120111011 its reverse (110111021201), we get a palindrome (212231132212).

It can be divided in two parts, 1021201 and 11011, that multiplied together give a palindrome (11244444211).

The spelling of 102120111011 in words is "one hundred two billion, one hundred twenty million, one hundred eleven thousand, eleven".