2131432121 has 8 divisors (see below), whose sum is σ = 2623301184. Its totient is φ = 1686407760.

The previous prime is 2131432097. The next prime is 2131432123. The reversal of 2131432121 is 1212341312.

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 2131432121 - 2¹⁰ = 2131431097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131432093 and 2131432102.

It is not an unprimeable number, because it can be changed into a prime (2131432123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11711075 + ... + 11711256.

It is an arithmetic number, because the mean of its divisors is an integer number (327912648).

Almost surely, 2^2131432121 is an apocalyptic number.

It is an amenable number.

2131432121 is a deficient number, since it is larger than the sum of its proper divisors (491869063).

2131432121 is a wasteful number, since it uses less digits than its factorization.

2131432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23422351.

The product of its digits is 288, while the sum is 20.

The square root of 2131432121 is about 46167.4357204296. The cubic root of 2131432121 is about 1286.9366490810.

Adding to 2131432121 its reverse (1212341312), we get a palindrome (3343773433).

It can be divided in two parts, 21314 and 32121, that added together give a palindrome (53435).

The spelling of 2131432121 in words is "two billion, one hundred thirty-one million, four hundred thirty-two thousand, one hundred twenty-one".