3031212121 has 8 divisors (see below), whose sum is σ = 3466033664. Its totient is φ = 2596838400.

The previous prime is 3031212109. The next prime is 3031212127. The reversal of 3031212121 is 1212121303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3031212121 - 2²¹ = 3029114969 is a prime.

It is a Duffinian number.

3031212121 is a modest number, since divided by 212121 gives 3031 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3031212095 and 3031212104.

It is not an unprimeable number, because it can be changed into a prime (3031212127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97320 + ... + 124633.

It is an arithmetic number, because the mean of its divisors is an integer number (433254208).

Almost surely, 2^3031212121 is an apocalyptic number.

It is an amenable number.

3031212121 is a deficient number, since it is larger than the sum of its proper divisors (434821543).

3031212121 is a wasteful number, since it uses less digits than its factorization.

3031212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223911.

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

The square root of 3031212121 is about 55056.4448634308. Note that the first 3 decimals coincide. The cubic root of 3031212121 is about 1447.2340646735.

Adding to 3031212121 its reverse (1212121303), we get a palindrome (4243333424).

The spelling of 3031212121 in words is "three billion, thirty-one million, two hundred twelve thousand, one hundred twenty-one".