7212021 has 8 divisors (see below), whose sum is σ = 9636960. Its totient is φ = 4797552.

The previous prime is 7212019. The next prime is 7212059. The reversal of 7212021 is 1202127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7212021 - 2¹ = 7212019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212011) 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, 835 + ... + 3888.

It is an arithmetic number, because the mean of its divisors is an integer number (1204620).

Almost surely, 2^7212021 is an apocalyptic number.

It is an amenable number.

7212021 is a deficient number, since it is larger than the sum of its proper divisors (2424939).

7212021 is a wasteful number, since it uses less digits than its factorization.

7212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 7212021 is about 2685.5206199171. The cubic root of 7212021 is about 193.2052815020.

Adding to 7212021 its reverse (1202127), we get a palindrome (8414148).

The spelling of 7212021 in words is "seven million, two hundred twelve thousand, twenty-one".