1213736135447 has 4 divisors (see below), whose sum is σ = 1324075784136. Its totient is φ = 1103396486760.

The previous prime is 1213736135333. The next prime is 1213736135449. The reversal of 1213736135447 is 7445316373121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213736135447 - 2³⁰ = 1212662393623 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 (1213736135449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55169824328 + ... + 55169824349.

It is an arithmetic number, because the mean of its divisors is an integer number (331018946034).

Almost surely, 2^{1213736135447} is an apocalyptic number.

1213736135447 is a deficient number, since it is larger than the sum of its proper divisors (110339648689).

1213736135447 is a wasteful number, since it uses less digits than its factorization.

1213736135447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110339648688.

The product of its digits is 1270080, while the sum is 47.

The spelling of 1213736135447 in words is "one trillion, two hundred thirteen billion, seven hundred thirty-six million, one hundred thirty-five thousand, four hundred forty-seven".