1213553055355 has 4 divisors (see below), whose sum is σ = 1456263666432. Its totient is φ = 970842444280.

The previous prime is 1213553055329. The next prime is 1213553055359. The reversal of 1213553055355 is 5535503553121.

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

It is not a de Polignac number, because 1213553055355 - 2²⁷ = 1213418837627 is a prime.

It is a super-2 number, since 2×1213553055355² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213553055359) 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, 121355305531 + ... + 121355305540.

It is an arithmetic number, because the mean of its divisors is an integer number (364065916608).

Almost surely, 2^{1213553055355} is an apocalyptic number.

1213553055355 is a deficient number, since it is larger than the sum of its proper divisors (242710611077).

1213553055355 is an equidigital number, since it uses as much as digits as its factorization.

1213553055355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242710611076.

The product of its (nonzero) digits is 843750, while the sum is 43.

The spelling of 1213553055355 in words is "one trillion, two hundred thirteen billion, five hundred fifty-three million, fifty-five thousand, three hundred fifty-five".