1213451152555 has 8 divisors (see below), whose sum is σ = 1456169601744. Its totient is φ = 970742109600.

The previous prime is 1213451152523. The next prime is 1213451152601. The reversal of 1213451152555 is 5552511543121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213451152555 - 2⁵ = 1213451152523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2064561 + ... + 2586370.

It is an arithmetic number, because the mean of its divisors is an integer number (182021200218).

Almost surely, 2^{1213451152555} is an apocalyptic number.

1213451152555 is a deficient number, since it is larger than the sum of its proper divisors (242718449189).

1213451152555 is an equidigital number, since it uses as much as digits as its factorization.

1213451152555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703117.

The product of its digits is 150000, while the sum is 40.

Adding to 1213451152555 its reverse (5552511543121), we get a palindrome (6765962695676).

The spelling of 1213451152555 in words is "one trillion, two hundred thirteen billion, four hundred fifty-one million, one hundred fifty-two thousand, five hundred fifty-five".