1320100031121 has 32 divisors (see below), whose sum is σ = 1883234914560. Its totient is φ = 820658851584.

The previous prime is 1320100031077. The next prime is 1320100031179. The reversal of 1320100031121 is 1211300010231.

It is a happy number.

It is not a de Polignac number, because 1320100031121 - 2³⁹ = 770344217233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320100031121.

It is not an unprimeable number, because it can be changed into a prime (1320100031821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 575466 + ... + 1723763.

It is an arithmetic number, because the mean of its divisors is an integer number (58851091080).

Almost surely, 2^{1320100031121} is an apocalyptic number.

It is an amenable number.

1320100031121 is a deficient number, since it is larger than the sum of its proper divisors (563134883439).

1320100031121 is a wasteful number, since it uses less digits than its factorization.

1320100031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299465.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1320100031121 its reverse (1211300010231), we get a palindrome (2531400041352).

The spelling of 1320100031121 in words is "one trillion, three hundred twenty billion, one hundred million, thirty-one thousand, one hundred twenty-one".