4212222121 has 4 divisors (see below), whose sum is σ = 4221817600. Its totient is φ = 4202626644.

The previous prime is 4212222101. The next prime is 4212222143. The reversal of 4212222121 is 1212222124.

4212222121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4212222121 - 2¹⁵ = 4212189353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4212222101) 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, 4797081 + ... + 4797958.

It is an arithmetic number, because the mean of its divisors is an integer number (1055454400).

Almost surely, 2^4212222121 is an apocalyptic number.

It is an amenable number.

4212222121 is a deficient number, since it is larger than the sum of its proper divisors (9595479).

4212222121 is an equidigital number, since it uses as much as digits as its factorization.

4212222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595478.

The product of its digits is 256, while the sum is 19.

The square root of 4212222121 is about 64901.6341936010. The cubic root of 4212222121 is about 1614.9921716497.

Adding to 4212222121 its reverse (1212222124), we get a palindrome (5424444245).

The spelling of 4212222121 in words is "four billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".