12101211011 has 2 divisors, whose sum is σ = 12101211012. Its totient is φ = 12101211010.

The previous prime is 12101210987. The next prime is 12101211043. The reversal of 12101211011 is 11011210121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101211011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12101210983 and 12101211001.

It is not a weakly prime, because it can be changed into another prime (12101211091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050605505 + 6050605506.

It is an arithmetic number, because the mean of its divisors is an integer number (6050605506).

Almost surely, 2^12101211011 is an apocalyptic number.

12101211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101211011 is an equidigital number, since it uses as much as digits as its factorization.

12101211011 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 12101211011 its reverse (11011210121), we get a palindrome (23112421132).

The spelling of 12101211011 in words is "twelve billion, one hundred one million, two hundred eleven thousand, eleven".