1228844515211 has 8 divisors (see below), whose sum is σ = 1307871093744. Its totient is φ = 1150567004160.

The previous prime is 1228844515193. The next prime is 1228844515231. The reversal of 1228844515211 is 1125154488221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1228844515211 - 2²² = 1228840320907 is a prime.

It is a super-2 number, since 2×1228844515211² (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 (1228844515231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187263485 + ... + 187270046.

It is an arithmetic number, because the mean of its divisors is an integer number (163483886718).

Almost surely, 2^{1228844515211} is an apocalyptic number.

1228844515211 is a deficient number, since it is larger than the sum of its proper divisors (79026578533).

1228844515211 is a wasteful number, since it uses less digits than its factorization.

1228844515211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374533741.

The product of its digits is 204800, while the sum is 44.

The spelling of 1228844515211 in words is "one trillion, two hundred twenty-eight billion, eight hundred forty-four million, five hundred fifteen thousand, two hundred eleven".