3201121231 has 8 divisors (see below), whose sum is σ = 3991008384. Its totient is φ = 2494380120.

The previous prime is 3201121229. The next prime is 3201121237. The reversal of 3201121231 is 1321211023.

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 3201121231 - 2¹ = 3201121229 is a prime.

It is a super-2 number, since 2×3201121231² = 20494354271117910722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201121237) 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, 20786425 + ... + 20786578.

It is an arithmetic number, because the mean of its divisors is an integer number (498876048).

Almost surely, 2^3201121231 is an apocalyptic number.

3201121231 is a deficient number, since it is larger than the sum of its proper divisors (789887153).

3201121231 is a wasteful number, since it uses less digits than its factorization.

3201121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41573021.

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

The square root of 3201121231 is about 56578.4520025071. The cubic root of 3201121231 is about 1473.7846897885.

Adding to 3201121231 its reverse (1321211023), we get a palindrome (4522332254).

The spelling of 3201121231 in words is "three billion, two hundred one million, one hundred twenty-one thousand, two hundred thirty-one".