1101312012121 has 4 divisors (see below), whose sum is σ = 1104431876532. Its totient is φ = 1098192147712.

The previous prime is 1101312012083. The next prime is 1101312012191. The reversal of 1101312012121 is 1212102131011.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 469821139225 + 631490872896 = 685435^2 + 794664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101312012121 - 2²⁹ = 1100775141209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101312012095 and 1101312012104.

It is not an unprimeable number, because it can be changed into a prime (1101312012191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559931676 + ... + 1559932381.

It is an arithmetic number, because the mean of its divisors is an integer number (276107969133).

Almost surely, 2^{1101312012121} is an apocalyptic number.

It is an amenable number.

1101312012121 is a deficient number, since it is larger than the sum of its proper divisors (3119864411).

1101312012121 is an equidigital number, since it uses as much as digits as its factorization.

1101312012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119864410.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1101312012121 its reverse (1212102131011), we get a palindrome (2313414143132).

The spelling of 1101312012121 in words is "one trillion, one hundred one billion, three hundred twelve million, twelve thousand, one hundred twenty-one".