1213032129109 has 2 divisors, whose sum is σ = 1213032129110. Its totient is φ = 1213032129108.

The previous prime is 1213032129097. The next prime is 1213032129137. The reversal of 1213032129109 is 9019212303121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901692680625 + 311339448484 = 949575^2 + 557978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213032129109 - 2¹⁹ = 1213031604821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213032129409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606516064554 + 606516064555.

It is an arithmetic number, because the mean of its divisors is an integer number (606516064555).

Almost surely, 2^{1213032129109} is an apocalyptic number.

It is an amenable number.

1213032129109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213032129109 is an equidigital number, since it uses as much as digits as its factorization.

1213032129109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 1213032129109 in words is "one trillion, two hundred thirteen billion, thirty-two million, one hundred twenty-nine thousand, one hundred nine".