1213231100329 has 2 divisors, whose sum is σ = 1213231100330. Its totient is φ = 1213231100328.

The previous prime is 1213231100299. The next prime is 1213231100377. The reversal of 1213231100329 is 9230011323121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181673354304 + 31557746025 = 1087048^2 + 177645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213231100329 - 2¹⁷ = 1213230969257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213231100297 and 1213231100306.

It is not a weakly prime, because it can be changed into another prime (1213231100429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606615550164 + 606615550165.

It is an arithmetic number, because the mean of its divisors is an integer number (606615550165).

Almost surely, 2^{1213231100329} is an apocalyptic number.

It is an amenable number.

1213231100329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213231100329 is an equidigital number, since it uses as much as digits as its factorization.

1213231100329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1213231100329 in words is "one trillion, two hundred thirteen billion, two hundred thirty-one million, one hundred thousand, three hundred twenty-nine".