3012111121 has 4 divisors (see below), whose sum is σ = 3015326692. Its totient is φ = 3008895552.

The previous prime is 3012111101. The next prime is 3012111149. The reversal of 3012111121 is 1211112103.

It is a happy number.

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 1630948225 + 1381162896 = 40385^2 + 37164^2 .

It is a cyclic number.

It is not a de Polignac number, because 3012111121 - 2⁷ = 3012110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3012111101) 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, 1606380 + ... + 1608253.

It is an arithmetic number, because the mean of its divisors is an integer number (753831673).

Almost surely, 2^3012111121 is an apocalyptic number.

It is an amenable number.

3012111121 is a deficient number, since it is larger than the sum of its proper divisors (3215571).

3012111121 is an equidigital number, since it uses as much as digits as its factorization.

3012111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215570.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 3012111121 is about 54882.7032953006. The cubic root of 3012111121 is about 1444.1877710065.

Adding to 3012111121 its reverse (1211112103), we get a palindrome (4223223224).

The spelling of 3012111121 in words is "three billion, twelve million, one hundred eleven thousand, one hundred twenty-one".