1212100111349 has 2 divisors, whose sum is σ = 1212100111350. Its totient is φ = 1212100111348.

The previous prime is 1212100111289. The next prime is 1212100111381. The reversal of 1212100111349 is 9431110012121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1147930102225 + 64170009124 = 1071415^2 + 253318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212100111349 - 2⁸ = 1212100111093 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 (1212100111549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606050055674 + 606050055675.

It is an arithmetic number, because the mean of its divisors is an integer number (606050055675).

Almost surely, 2^{1212100111349} is an apocalyptic number.

It is an amenable number.

1212100111349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212100111349 is an equidigital number, since it uses as much as digits as its factorization.

1212100111349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1212100111349 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred eleven thousand, three hundred forty-nine".