1209291211013 has 4 divisors (see below), whose sum is σ = 1210066896480. Its totient is φ = 1208515525548.

The previous prime is 1209291211001. The next prime is 1209291211049. The reversal of 1209291211013 is 3101121929021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1209291211013 - 2⁶ = 1209291210949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209291231013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387840395 + ... + 387843512.

It is an arithmetic number, because the mean of its divisors is an integer number (302516724120).

Almost surely, 2^{1209291211013} is an apocalyptic number.

It is an amenable number.

1209291211013 is a deficient number, since it is larger than the sum of its proper divisors (775685467).

1209291211013 is an equidigital number, since it uses as much as digits as its factorization.

1209291211013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775685466.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 1209291211013 in words is "one trillion, two hundred nine billion, two hundred ninety-one million, two hundred eleven thousand, thirteen".