1211102231011 has 2 divisors, whose sum is σ = 1211102231012. Its totient is φ = 1211102231010.

The previous prime is 1211102230991. The next prime is 1211102231029. The reversal of 1211102231011 is 1101322011121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211102231011 - 2¹⁷ = 1211102099939 is a prime.

It is a super-2 number, since 2×1211102231011² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211102231711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551115505 + 605551115506.

It is an arithmetic number, because the mean of its divisors is an integer number (605551115506).

Almost surely, 2^{1211102231011} is an apocalyptic number.

1211102231011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102231011 is an equidigital number, since it uses as much as digits as its factorization.

1211102231011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211102231011 its reverse (1101322011121), we get a palindrome (2312424242132).

The spelling of 1211102231011 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred thirty-one thousand, eleven".