1211100033113 has 4 divisors (see below), whose sum is σ = 1233950977188. Its totient is φ = 1188249089040.

The previous prime is 1211100033097. The next prime is 1211100033119. The reversal of 1211100033113 is 3113300011121.

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 406855173904 + 804244859209 = 637852^2 + 896797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211100033113 - 2⁴ = 1211100033097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211100033091 and 1211100033100.

It is not an unprimeable number, because it can be changed into a prime (1211100033119) 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, 11425471958 + ... + 11425472063.

It is an arithmetic number, because the mean of its divisors is an integer number (308487744297).

Almost surely, 2^{1211100033113} is an apocalyptic number.

It is an amenable number.

1211100033113 is a deficient number, since it is larger than the sum of its proper divisors (22850944075).

1211100033113 is an equidigital number, since it uses as much as digits as its factorization.

1211100033113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22850944074.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1211100033113 its reverse (3113300011121), we get a palindrome (4324400044234).

The spelling of 1211100033113 in words is "one trillion, two hundred eleven billion, one hundred million, thirty-three thousand, one hundred thirteen".