3124121221 has 8 divisors (see below), whose sum is σ = 3366382040. Its totient is φ = 2882138112.

The previous prime is 3124121219. The next prime is 3124121291. The reversal of 3124121221 is 1221214213.

3124121221 is digitally balanced in base 2, 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 4 ways, for example, as 355888225 + 2768232996 = 18865^2 + 52614^2 .

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 3124121221 - 2¹ = 3124121219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3124121291) 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, 45756 + ... + 91333.

It is an arithmetic number, because the mean of its divisors is an integer number (420797755).

Almost surely, 2^3124121221 is an apocalyptic number.

It is an amenable number.

3124121221 is a deficient number, since it is larger than the sum of its proper divisors (242260819).

3124121221 is a wasteful number, since it uses less digits than its factorization.

3124121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138855.

The product of its digits is 192, while the sum is 19.

The square root of 3124121221 is about 55893.8388465133. The cubic root of 3124121221 is about 1461.8718127713.

Adding to 3124121221 its reverse (1221214213), we get a palindrome (4345335434).

The spelling of 3124121221 in words is "three billion, one hundred twenty-four million, one hundred twenty-one thousand, two hundred twenty-one".