1211110011101 has 2 divisors, whose sum is σ = 1211110011102. Its totient is φ = 1211110011100.

The previous prime is 1211110011079. The next prime is 1211110011107. The reversal of 1211110011101 is 1011100111121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206155259001 + 4954752100 = 1098251^2 + 70390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211110011101 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211110011107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555005550 + 605555005551.

It is an arithmetic number, because the mean of its divisors is an integer number (605555005551).

Almost surely, 2^{1211110011101} is an apocalyptic number.

It is an amenable number.

1211110011101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211110011101 is an equidigital number, since it uses as much as digits as its factorization.

1211110011101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1211110011101 its reverse (1011100111121), we get a palindrome (2222210122222).

The spelling of 1211110011101 in words is "one trillion, two hundred eleven billion, one hundred ten million, eleven thousand, one hundred one".