1321102412555 has 16 divisors (see below), whose sum is σ = 1587081232800. Its totient is φ = 1055710027008.

The previous prime is 1321102412507. The next prime is 1321102412569. The reversal of 1321102412555 is 5552142011231.

It is a cyclic number.

It is not a de Polignac number, because 1321102412555 - 2³⁶ = 1252382935819 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42432224 + ... + 42463346.

It is an arithmetic number, because the mean of its divisors is an integer number (99192577050).

Almost surely, 2^{1321102412555} is an apocalyptic number.

1321102412555 is a deficient number, since it is larger than the sum of its proper divisors (265978820245).

1321102412555 is a wasteful number, since it uses less digits than its factorization.

1321102412555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40270.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 1321102412555 its reverse (5552142011231), we get a palindrome (6873244423786).

The spelling of 1321102412555 in words is "one trillion, three hundred twenty-one billion, one hundred two million, four hundred twelve thousand, five hundred fifty-five".