32212021 has 4 divisors (see below), whose sum is σ = 32240044. Its totient is φ = 32184000.

The previous prime is 32212009. The next prime is 32212043. The reversal of 32212021 is 12021223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12021223 = 71 ⋅169313.

It can be written as a sum of positive squares in 2 ways, for example, as 10923025 + 21288996 = 3305^2 + 4614^2 .

It is a cyclic number.

It is not a de Polignac number, because 32212021 - 2⁵ = 32211989 is a prime.

It is a super-2 number, since 2×32212021² = 2075228593808882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32211992 and 32212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12210 + ... + 14611.

It is an arithmetic number, because the mean of its divisors is an integer number (8060011).

Almost surely, 2^32212021 is an apocalyptic number.

It is an amenable number.

32212021 is a deficient number, since it is larger than the sum of its proper divisors (28023).

32212021 is a wasteful number, since it uses less digits than its factorization.

32212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28022.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 32212021 is about 5675.5634962530. The cubic root of 32212021 is about 318.1798390749.

Adding to 32212021 its reverse (12021223), we get a palindrome (44233244).

The spelling of 32212021 in words is "thirty-two million, two hundred twelve thousand, twenty-one".