1144431231220 has 24 divisors (see below), whose sum is σ = 2409298883208. Its totient is φ = 456630912000.

The previous prime is 1144431231131. The next prime is 1144431231233. The reversal of 1144431231220 is 221321344411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 852024994704 + 292406236516 = 923052^2 + 540746^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71340561 + ... + 71356600.

It is an arithmetic number, because the mean of its divisors is an integer number (100387453467).

Almost surely, 2^{1144431231220} is an apocalyptic number.

1144431231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144431231220 is an abundant number, since it is smaller than the sum of its proper divisors (1264867651988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1144431231220 is a wasteful number, since it uses less digits than its factorization.

1144431231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142697571 (or 142697569 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1144431231220 its reverse (221321344411), we get a palindrome (1365752575631).

The spelling of 1144431231220 in words is "one trillion, one hundred forty-four billion, four hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty".