1155122215511 has 12 divisors (see below), whose sum is σ = 1269719796072. Its totient is φ = 1050078018000.

The previous prime is 1155122215477. The next prime is 1155122215531.

1155122215511 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1155122215511 - 2⁶ = 1155122215447 is a prime.

It is a super-2 number, since 2×1155122215511² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155122215531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4231016 + ... + 4495746.

It is an arithmetic number, because the mean of its divisors is an integer number (105809983006).

Almost surely, 2^{1155122215511} is an apocalyptic number.

1155122215511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1155122215511 is a deficient number, since it is larger than the sum of its proper divisors (114597580561).

1155122215511 is a wasteful number, since it uses less digits than its factorization.

1155122215511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300814 (or 300803 counting only the distinct ones).

The product of its digits is 5000, while the sum is 32.

The spelling of 1155122215511 in words is "one trillion, one hundred fifty-five billion, one hundred twenty-two million, two hundred fifteen thousand, five hundred eleven".