1213110011005 has 4 divisors (see below), whose sum is σ = 1455732013212. Its totient is φ = 970488008800.

The previous prime is 1213110010997. The next prime is 1213110011011. The reversal of 1213110011005 is 5001100113121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 719894553156 + 493215457849 = 848466^2 + 702293^2 .

It is not a de Polignac number, because 1213110011005 - 2³ = 1213110010997 is a prime.

It is a super-2 number, since 2×1213110011005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213110011005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121311001096 + ... + 121311001105.

It is an arithmetic number, because the mean of its divisors is an integer number (363933003303).

Almost surely, 2^{1213110011005} is an apocalyptic number.

It is an amenable number.

1213110011005 is a deficient number, since it is larger than the sum of its proper divisors (242622002207).

1213110011005 is an equidigital number, since it uses as much as digits as its factorization.

1213110011005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242622002206.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 1213110011005 its reverse (5001100113121), we get a palindrome (6214210124126).

The spelling of 1213110011005 in words is "one trillion, two hundred thirteen billion, one hundred ten million, eleven thousand, five".