2321232121 has 4 divisors (see below), whose sum is σ = 2499788452. Its totient is φ = 2142675792.

The previous prime is 2321232107. The next prime is 2321232143. The reversal of 2321232121 is 1212321232.

2321232121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2321232121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160376896 + 2160855225 = 12664^2 + 46485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321232121 - 2⁷ = 2321231993 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321232161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89278146 + ... + 89278171.

It is an arithmetic number, because the mean of its divisors is an integer number (624947113).

Almost surely, 2^2321232121 is an apocalyptic number.

It is an amenable number.

2321232121 is a deficient number, since it is larger than the sum of its proper divisors (178556331).

2321232121 is a wasteful number, since it uses less digits than its factorization.

2321232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178556330.

The product of its digits is 288, while the sum is 19.

The square root of 2321232121 is about 48179.1668773963. The cubic root of 2321232121 is about 1324.0555027116.

Adding to 2321232121 its reverse (1212321232), we get a palindrome (3533553353).

It can be divided in two parts, 2 and 321232121, that added together give a palindrome (321232123).

The spelling of 2321232121 in words is "two billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred twenty-one".