1131021120424 has 32 divisors (see below), whose sum is σ = 2284243544520. Its totient is φ = 521906685696.

The previous prime is 1131021120373. The next prime is 1131021120443. The reversal of 1131021120424 is 4240211201311.

It can be written as a sum of positive squares in 4 ways, for example, as 766062562500 + 364958557924 = 875250^2 + 604118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1131021120395 and 1131021120404.

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, 543019 + ... + 1599034.

Almost surely, 2^{1131021120424} is an apocalyptic number.

It is an amenable number.

1131021120424 is an abundant number, since it is smaller than the sum of its proper divisors (1153222424096).

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

1131021120424 is a wasteful number, since it uses less digits than its factorization.

1131021120424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147149 (or 2147145 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1131021120424 its reverse (4240211201311), we get a palindrome (5371232321735).

The spelling of 1131021120424 in words is "one trillion, one hundred thirty-one billion, twenty-one million, one hundred twenty thousand, four hundred twenty-four".