2121312033 has 6 divisors (see below), whose sum is σ = 3064117394. Its totient is φ = 1414208016.

The previous prime is 2121312031. The next prime is 2121312041. The reversal of 2121312033 is 3302131212.

2121312033 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2111218704 + 10093329 = 45948^2 + 3177^2 .

It is not a de Polignac number, because 2121312033 - 2¹ = 2121312031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121311997 and 2121312015.

It is not an unprimeable number, because it can be changed into a prime (2121312031) 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, 117850660 + ... + 117850677.

Almost surely, 2^2121312033 is an apocalyptic number.

It is an amenable number.

2121312033 is a deficient number, since it is larger than the sum of its proper divisors (942805361).

2121312033 is a wasteful number, since it uses less digits than its factorization.

2121312033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235701343 (or 235701340 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2121312033 is about 46057.7032970599. The cubic root of 2121312033 is about 1284.8966155021.

Adding to 2121312033 its reverse (3302131212), we get a palindrome (5423443245).

The spelling of 2121312033 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, thirty-three".