12111021011 has 2 divisors, whose sum is σ = 12111021012. Its totient is φ = 12111021010.

The previous prime is 12111020989. The next prime is 12111021029. The reversal of 12111021011 is 11012011121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111021011 - 2¹⁸ = 12110758867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111020983 and 12111021001.

It is not a weakly prime, because it can be changed into another prime (12111021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055510505 + 6055510506.

It is an arithmetic number, because the mean of its divisors is an integer number (6055510506).

Almost surely, 2^12111021011 is an apocalyptic number.

12111021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111021011 is an equidigital number, since it uses as much as digits as its factorization.

12111021011 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 12111021011 its reverse (11012011121), we get a palindrome (23123032132).

The spelling of 12111021011 in words is "twelve billion, one hundred eleven million, twenty-one thousand, eleven".