1131223101020 has 12 divisors (see below), whose sum is σ = 2375568512184. Its totient is φ = 452489240400.

The previous prime is 1131223101007. The next prime is 1131223101079. The reversal of 1131223101020 is 201013221311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131223101020.

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 3 ways as a sum of consecutive naturals, for example, 28280577506 + ... + 28280577545.

It is an arithmetic number, because the mean of its divisors is an integer number (197964042682).

Almost surely, 2^{1131223101020} is an apocalyptic number.

1131223101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131223101020 is an abundant number, since it is smaller than the sum of its proper divisors (1244345411164).

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

1131223101020 is a wasteful number, since it uses less digits than its factorization.

1131223101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56561155060 (or 56561155058 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1131223101020 its reverse (201013221311), we get a palindrome (1332236322331).

The spelling of 1131223101020 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred one thousand, twenty".