1212101121229 has 2 divisors, whose sum is σ = 1212101121230. Its totient is φ = 1212101121228.

The previous prime is 1212101121211. The next prime is 1212101121289. The reversal of 1212101121229 is 9221211012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871889062500 + 340212058729 = 933750^2 + 583277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212101121229 - 2⁵ = 1212101121197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212101121289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606050560614 + 606050560615.

It is an arithmetic number, because the mean of its divisors is an integer number (606050560615).

Almost surely, 2^{1212101121229} is an apocalyptic number.

It is an amenable number.

1212101121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212101121229 is an equidigital number, since it uses as much as digits as its factorization.

1212101121229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 1212101121229 in words is "one trillion, two hundred twelve billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-nine".