1231121334444 has 48 divisors (see below), whose sum is σ = 2940119478912. Its totient is φ = 400735020672.

The previous prime is 1231121334437. The next prime is 1231121334451. The reversal of 1231121334444 is 4444331211321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231121334437) and next prime (1231121334451).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1908232 + ... + 2470544.

It is an arithmetic number, because the mean of its divisors is an integer number (61252489144).

Almost surely, 2^{1231121334444} is an apocalyptic number.

It is an amenable number.

1231121334444 is an abundant number, since it is smaller than the sum of its proper divisors (1708998144468).

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

1231121334444 is a wasteful number, since it uses less digits than its factorization.

1231121334444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566606 (or 566604 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

Adding to 1231121334444 its reverse (4444331211321), we get a palindrome (5675452545765).

It can be divided in two parts, 1231121 and 334444, that added together give a triangular number (1565565 = T₁₇₆₉).

The spelling of 1231121334444 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-one million, three hundred thirty-four thousand, four hundred forty-four".