11312121033 has 6 divisors (see below), whose sum is σ = 16339730394. Its totient is φ = 7541414016.

The previous prime is 11312121017. The next prime is 11312121047. The reversal of 11312121033 is 33012121311.

It can be written as a sum of positive squares in only one way, i.e., 11090617344 + 221503689 = 105312^2 + 14883^2 .

It is not a de Polignac number, because 11312121033 - 2⁴ = 11312121017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11312120997 and 11312121015.

It is not an unprimeable number, because it can be changed into a prime (11312121083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628451160 + ... + 628451177.

It is an arithmetic number, because the mean of its divisors is an integer number (2723288399).

Almost surely, 2^11312121033 is an apocalyptic number.

It is an amenable number.

11312121033 is a deficient number, since it is larger than the sum of its proper divisors (5027609361).

11312121033 is a wasteful number, since it uses less digits than its factorization.

11312121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256902343 (or 1256902340 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11312121033 its reverse (33012121311), we get a palindrome (44324242344).

The spelling of 11312121033 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, thirty-three".