1211132111311 has 2 divisors, whose sum is σ = 1211132111312. Its totient is φ = 1211132111310.

The previous prime is 1211132111303. The next prime is 1211132111347. The reversal of 1211132111311 is 1131112311121.

It is a m-pointer prime, because the next prime (1211132111347) can be obtained adding 1211132111311 to its product of digits (36).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211132111311 - 2³ = 1211132111303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211132141311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605566055655 + 605566055656.

It is an arithmetic number, because the mean of its divisors is an integer number (605566055656).

Almost surely, 2^{1211132111311} is an apocalyptic number.

1211132111311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211132111311 is an equidigital number, since it uses as much as digits as its factorization.

1211132111311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 19.

Adding to 1211132111311 its reverse (1131112311121), we get a palindrome (2342244422432).

The spelling of 1211132111311 in words is "one trillion, two hundred eleven billion, one hundred thirty-two million, one hundred eleven thousand, three hundred eleven".