1331031231122 has 4 divisors (see below), whose sum is σ = 1996546846686. Its totient is φ = 665515615560.

The previous prime is 1331031231113. The next prime is 1331031231149. The reversal of 1331031231122 is 2211321301331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1183767936121 + 147263295001 = 1088011^2 + 383749^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332757807779 + ... + 332757807782.

Almost surely, 2^{1331031231122} is an apocalyptic number.

1331031231122 is a deficient number, since it is larger than the sum of its proper divisors (665515615564).

1331031231122 is an equidigital number, since it uses as much as digits as its factorization.

1331031231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665515615563.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331031231122 its reverse (2211321301331), we get a palindrome (3542352532453).

The spelling of 1331031231122 in words is "one trillion, three hundred thirty-one billion, thirty-one million, two hundred thirty-one thousand, one hundred twenty-two".