1213202023129 has 2 divisors, whose sum is σ = 1213202023130. Its totient is φ = 1213202023128.

The previous prime is 1213202023063. The next prime is 1213202023211. The reversal of 1213202023129 is 9213202023121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784632782025 + 428569241104 = 885795^2 + 654652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213202023129 - 2¹⁷ = 1213201892057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213202023097 and 1213202023106.

It is not a weakly prime, because it can be changed into another prime (1213202026129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606601011564 + 606601011565.

It is an arithmetic number, because the mean of its divisors is an integer number (606601011565).

Almost surely, 2^{1213202023129} is an apocalyptic number.

It is an amenable number.

1213202023129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213202023129 is an equidigital number, since it uses as much as digits as its factorization.

1213202023129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 1213202023129 in words is "one trillion, two hundred thirteen billion, two hundred two million, twenty-three thousand, one hundred twenty-nine".