4212021 has 8 divisors (see below), whose sum is σ = 6126624. Its totient is φ = 2552720.

The previous prime is 4211993. The next prime is 4212023. The reversal of 4212021 is 1202124.

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 4212021 - 2¹⁸ = 3949877 is a prime.

It is a super-2 number, since 2×4212021² = 35482241808882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4211988 and 4212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4212023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63786 + ... + 63851.

It is an arithmetic number, because the mean of its divisors is an integer number (765828).

Almost surely, 2^4212021 is an apocalyptic number.

It is an amenable number.

4212021 is a deficient number, since it is larger than the sum of its proper divisors (1914603).

4212021 is a wasteful number, since it uses less digits than its factorization.

4212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127651.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4212021 is about 2052.3208813439. The cubic root of 4212021 is about 161.4966467560.

Adding to 4212021 its reverse (1202124), we get a palindrome (5414145).

It can be divided in two parts, 421 and 2021, that added together give a palindrome (2442).

The spelling of 4212021 in words is "four million, two hundred twelve thousand, twenty-one".