1131203222442 has 448 divisors, whose sum is σ = 2860656575904. Its totient is φ = 333773291520.

The previous prime is 1131203222437. The next prime is 1131203222453. The reversal of 1131203222442 is 2442223021311.

1131203222442 is a `hidden beast` number, since 1 + 1 + 312 + 0 + 322 + 24 + 4 + 2 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 112760968401 + 1018442254041 = 335799^2 + 1009179^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 4083766008 + ... + 4083766284.

Almost surely, 2^{1131203222442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131203222442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430328287952).

1131203222442 is an abundant number, since it is smaller than the sum of its proper divisors (1729453353462).

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

1131203222442 is a wasteful number, since it uses less digits than its factorization.

1131203222442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1131203222442 its reverse (2442223021311), we get a palindrome (3573426243753).

The spelling of 1131203222442 in words is "one trillion, one hundred thirty-one billion, two hundred three million, two hundred twenty-two thousand, four hundred forty-two".