4212111021 has 4 divisors (see below), whose sum is σ = 5616148032. Its totient is φ = 2808074012.

The previous prime is 4212111017. The next prime is 4212111077. The reversal of 4212111021 is 1201112124.

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 4212111021 - 2² = 4212111017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4212111011) 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, 702018501 + ... + 702018506.

It is an arithmetic number, because the mean of its divisors is an integer number (1404037008).

Almost surely, 2^4212111021 is an apocalyptic number.

It is an amenable number.

4212111021 is a deficient number, since it is larger than the sum of its proper divisors (1404037011).

4212111021 is a wasteful number, since it uses less digits than its factorization.

4212111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404037010.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 4212111021 is about 64900.7782773057. The cubic root of 4212111021 is about 1614.9779727144.

Adding to 4212111021 its reverse (1201112124), we get a palindrome (5413223145).

The spelling of 4212111021 in words is "four billion, two hundred twelve million, one hundred eleven thousand, twenty-one".