3031012121 has 4 divisors (see below), whose sum is σ = 3061022244. Its totient is φ = 3001002000.

The previous prime is 3031012057. The next prime is 3031012123. The reversal of 3031012121 is 1212101303.

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 1514766400 + 1516245721 = 38920^2 + 38939^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031012121 - 2⁶ = 3031012057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3031012096 and 3031012105.

It is not an unprimeable number, because it can be changed into a prime (3031012123) 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, 15004910 + ... + 15005111.

It is an arithmetic number, because the mean of its divisors is an integer number (765255561).

Almost surely, 2^3031012121 is an apocalyptic number.

It is an amenable number.

3031012121 is a deficient number, since it is larger than the sum of its proper divisors (30010123).

3031012121 is a wasteful number, since it uses less digits than its factorization.

3031012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30010122.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 3031012121 is about 55054.6285156843. The cubic root of 3031012121 is about 1447.2022343729.

Adding to 3031012121 its reverse (1212101303), we get a palindrome (4243113424).

The spelling of 3031012121 in words is "three billion, thirty-one million, twelve thousand, one hundred twenty-one".