1318255114221 has 6 divisors (see below), whose sum is σ = 1904146276110. Its totient is φ = 878836742808.

The previous prime is 1318255114219. The next prime is 1318255114243. The reversal of 1318255114221 is 1224115528131.

1318255114221 is a `hidden beast` number, since 1 + 3 + 1 + 82 + 5 + 511 + 42 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1207825178121 + 110429936100 = 1099011^2 + 332310^2 .

It is not a de Polignac number, because 1318255114221 - 2¹ = 1318255114219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318255114291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73236395226 + ... + 73236395243.

It is an arithmetic number, because the mean of its divisors is an integer number (317357712685).

Almost surely, 2^{1318255114221} is an apocalyptic number.

It is an amenable number.

1318255114221 is a deficient number, since it is larger than the sum of its proper divisors (585891161889).

1318255114221 is a wasteful number, since it uses less digits than its factorization.

1318255114221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146472790475 (or 146472790472 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The spelling of 1318255114221 in words is "one trillion, three hundred eighteen billion, two hundred fifty-five million, one hundred fourteen thousand, two hundred twenty-one".