1211111113207 has 2 divisors, whose sum is σ = 1211111113208. Its totient is φ = 1211111113206.

The previous prime is 1211111113171. The next prime is 1211111113253. The reversal of 1211111113207 is 7023111111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211111113207 - 2²³ = 1211102724599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211111113297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555556603 + 605555556604.

It is an arithmetic number, because the mean of its divisors is an integer number (605555556604).

Almost surely, 2^{1211111113207} is an apocalyptic number.

1211111113207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211111113207 is an equidigital number, since it uses as much as digits as its factorization.

1211111113207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 22.

Adding to 1211111113207 its reverse (7023111111121), we get a palindrome (8234222224328).

The spelling of 1211111113207 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred thirteen thousand, two hundred seven".