4232212121 has 4 divisors (see below), whose sum is σ = 4378150500. Its totient is φ = 4086273744.

The previous prime is 4232212111. The next prime is 4232212123. The reversal of 4232212121 is 1212122324.

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 1159062025 + 3073150096 = 34045^2 + 55436^2 .

It is a cyclic number.

It is not a de Polignac number, because 4232212121 - 2²² = 4228017817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4232212093 and 4232212102.

It is not an unprimeable number, because it can be changed into a prime (4232212123) 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 3 ways as a sum of consecutive naturals, for example, 72969146 + ... + 72969203.

It is an arithmetic number, because the mean of its divisors is an integer number (1094537625).

Almost surely, 2^4232212121 is an apocalyptic number.

It is an amenable number.

4232212121 is a deficient number, since it is larger than the sum of its proper divisors (145938379).

4232212121 is a wasteful number, since it uses less digits than its factorization.

4232212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145938378.

The product of its digits is 384, while the sum is 20.

The square root of 4232212121 is about 65055.4541987065. The cubic root of 4232212121 is about 1617.5429043418.

Adding to 4232212121 its reverse (1212122324), we get a palindrome (5444334445).

The spelling of 4232212121 in words is "four billion, two hundred thirty-two million, two hundred twelve thousand, one hundred twenty-one".