1155541214421 has 96 divisors (see below), whose sum is σ = 1981845830016. Its totient is φ = 640742400000.

The previous prime is 1155541214381. The next prime is 1155541214447. The reversal of 1155541214421 is 1244121455511.

1155541214421 is a `hidden beast` number, since 1 + 1 + 55 + 541 + 2 + 1 + 44 + 21 = 666.

It is not a de Polignac number, because 1155541214421 - 2¹⁰ = 1155541213397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155541214491) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 74779746 + ... + 74795196.

It is an arithmetic number, because the mean of its divisors is an integer number (20644227396).

Almost surely, 2^{1155541214421} is an apocalyptic number.

1155541214421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155541214421 is a deficient number, since it is larger than the sum of its proper divisors (826304615595).

1155541214421 is a wasteful number, since it uses less digits than its factorization.

1155541214421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16723 (or 16720 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

Adding to 1155541214421 its reverse (1244121455511), we get a palindrome (2399662669932).

The spelling of 1155541214421 in words is "one trillion, one hundred fifty-five billion, five hundred forty-one million, two hundred fourteen thousand, four hundred twenty-one".