1311121011121 has 16 divisors (see below), whose sum is σ = 1379422123200. Its totient is φ = 1244362392000.

The previous prime is 1311121011113. The next prime is 1311121011139. The reversal of 1311121011121 is 1211101211131.

It is not a de Polignac number, because 1311121011121 - 2³ = 1311121011113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311121011095 and 1311121011104.

It is not an unprimeable number, because it can be changed into a prime (1311121011521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39355171 + ... + 39388471.

It is an arithmetic number, because the mean of its divisors is an integer number (86213882700).

Almost surely, 2^{1311121011121} is an apocalyptic number.

It is an amenable number.

1311121011121 is a deficient number, since it is larger than the sum of its proper divisors (68301112079).

1311121011121 is a wasteful number, since it uses less digits than its factorization.

1311121011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56400.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1311121011121 its reverse (1211101211131), we get a palindrome (2522222222252).

The spelling of 1311121011121 in words is "one trillion, three hundred eleven billion, one hundred twenty-one million, eleven thousand, one hundred twenty-one".