1211121012011 has 2 divisors, whose sum is σ = 1211121012012. Its totient is φ = 1211121012010.

The previous prime is 1211121011999. The next prime is 1211121012047. The reversal of 1211121012011 is 1102101211121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211121012011 - 2³⁸ = 936243105067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211121012091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560506005 + 605560506006.

It is an arithmetic number, because the mean of its divisors is an integer number (605560506006).

Almost surely, 2^{1211121012011} is an apocalyptic number.

1211121012011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211121012011 is an equidigital number, since it uses as much as digits as its factorization.

1211121012011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211121012011 its reverse (1102101211121), we get a palindrome (2313222223132).

The spelling of 1211121012011 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, twelve thousand, eleven".