3011223121 has 4 divisors (see below), whose sum is σ = 3013920052. Its totient is φ = 3008526192.

The previous prime is 3011223109. The next prime is 3011223139. The reversal of 3011223121 is 1213221103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1213221103 = 5413 ⋅224131.

It can be written as a sum of positive squares in 2 ways, for example, as 1617246225 + 1393976896 = 40215^2 + 37336^2 .

It is a cyclic number.

It is not a de Polignac number, because 3011223121 - 2¹⁵ = 3011190353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3011223095 and 3011223104.

It is not an unprimeable number, because it can be changed into a prime (3011223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346790 + ... + 1349023.

It is an arithmetic number, because the mean of its divisors is an integer number (753480013).

Almost surely, 2^3011223121 is an apocalyptic number.

It is an amenable number.

3011223121 is a deficient number, since it is larger than the sum of its proper divisors (2696931).

3011223121 is a wasteful number, since it uses less digits than its factorization.

3011223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696930.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3011223121 is about 54874.6127184511. The cubic root of 3011223121 is about 1444.0458368021.

Adding to 3011223121 its reverse (1213221103), we get a palindrome (4224444224).

The spelling of 3011223121 in words is "three billion, eleven million, two hundred twenty-three thousand, one hundred twenty-one".