1321131122142 has 24 divisors (see below), whose sum is σ = 2861147876184. Its totient is φ = 406501883424.

The previous prime is 1321131122137. The next prime is 1321131122243. The reversal of 1321131122142 is 2412211311231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651444313 + ... + 651446340.

It is an arithmetic number, because the mean of its divisors is an integer number (119214494841).

Almost surely, 2^{1321131122142} is an apocalyptic number.

1321131122142 is an abundant number, since it is smaller than the sum of its proper divisors (1540016754042).

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

1321131122142 is a wasteful number, since it uses less digits than its factorization.

1321131122142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302890684 (or 1302890671 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

Adding to 1321131122142 its reverse (2412211311231), we get a palindrome (3733342433373).

The spelling of 1321131122142 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, one hundred twenty-two thousand, one hundred forty-two".