3121121204 has 6 divisors (see below), whose sum is σ = 5461962114. Its totient is φ = 1560560600.

The previous prime is 3121121197. The next prime is 3121121209. The reversal of 3121121204 is 4021211213.

It can be written as a sum of positive squares in only one way, i.e., 1874890000 + 1246231204 = 43300^2 + 35302^2 .

It is a super-3 number, since 3×3121121204³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390140147 + ... + 390140154.

It is an arithmetic number, because the mean of its divisors is an integer number (910327019).

Almost surely, 2^3121121204 is an apocalyptic number.

It is an amenable number.

3121121204 is a deficient number, since it is larger than the sum of its proper divisors (2340840910).

3121121204 is a wasteful number, since it uses less digits than its factorization.

3121121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780280305 (or 780280303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 3121121204 is about 55866.9956593336. The cubic root of 3121121204 is about 1461.4037296916.

Adding to 3121121204 its reverse (4021211213), we get a palindrome (7142332417).

Subtracting 3121121204 from its reverse (4021211213), we obtain a palindrome (900090009).

The spelling of 3121121204 in words is "three billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred four".