3205121121 has 24 divisors (see below), whose sum is σ = 4738803264. Its totient is φ = 2086919520.

The previous prime is 3205121119. The next prime is 3205121131. The reversal of 3205121121 is 1211215023.

3205121121 is a `hidden beast` number, since 32 + 0 + 512 + 1 + 121 = 666.

It is not a de Polignac number, because 3205121121 - 2¹ = 3205121119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3205121094 and 3205121103.

It is not an unprimeable number, because it can be changed into a prime (3205121131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44935 + ... + 91811.

It is an arithmetic number, because the mean of its divisors is an integer number (197450136).

Almost surely, 2^3205121121 is an apocalyptic number.

It is an amenable number.

3205121121 is a deficient number, since it is larger than the sum of its proper divisors (1533682143).

3205121121 is a wasteful number, since it uses less digits than its factorization.

3205121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47061 (or 47058 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 3205121121 is about 56613.7891418690. The cubic root of 3205121121 is about 1474.3982792788.

Adding to 3205121121 its reverse (1211215023), we get a palindrome (4416336144).

The spelling of 3205121121 in words is "three billion, two hundred five million, one hundred twenty-one thousand, one hundred twenty-one".