3201212121 has 16 divisors (see below), whose sum is σ = 4285068480. Its totient is φ = 2125766720.

The previous prime is 3201212111. The next prime is 3201212153. The reversal of 3201212121 is 1212121023.

It is a cyclic number.

It is not a de Polignac number, because 3201212121 - 2⁵ = 3201212089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3201212121.

It is not an unprimeable number, because it can be changed into a prime (3201212111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942895 + ... + 946283.

It is an arithmetic number, because the mean of its divisors is an integer number (267816780).

Almost surely, 2^3201212121 is an apocalyptic number.

It is an amenable number.

3201212121 is a deficient number, since it is larger than the sum of its proper divisors (1083856359).

3201212121 is a wasteful number, since it uses less digits than its factorization.

3201212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3201212121 is about 56579.2552177916. The cubic root of 3201212121 is about 1473.7986381327.

Adding to 3201212121 its reverse (1212121023), we get a palindrome (4413333144).

The spelling of 3201212121 in words is "three billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".