1145021438899 has 4 divisors (see below), whose sum is σ = 1233100011136. Its totient is φ = 1056942866664.

The previous prime is 1145021438893. The next prime is 1145021438903. The reversal of 1145021438899 is 9988341205411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145021438899 - 2²¹ = 1145019341747 is a prime.

It is a super-2 number, since 2×1145021438899² (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 (1145021438893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44039286099 + ... + 44039286124.

It is an arithmetic number, because the mean of its divisors is an integer number (308275002784).

Almost surely, 2^{1145021438899} is an apocalyptic number.

1145021438899 is a deficient number, since it is larger than the sum of its proper divisors (88078572237).

1145021438899 is an equidigital number, since it uses as much as digits as its factorization.

1145021438899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88078572236.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 1145021438899 in words is "one trillion, one hundred forty-five billion, twenty-one million, four hundred thirty-eight thousand, eight hundred ninety-nine".