36212021 has 4 divisors (see below), whose sum is σ = 36356544. Its totient is φ = 36067500.

The previous prime is 36212009. The next prime is 36212041. The reversal of 36212021 is 12021263.

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 a de Polignac number, because none of the positive numbers 2^k-36212021 is a prime.

It is a super-2 number, since 2×36212021² = 2622620929808882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71885 + ... + 72386.

It is an arithmetic number, because the mean of its divisors is an integer number (9089136).

Almost surely, 2^36212021 is an apocalyptic number.

It is an amenable number.

36212021 is a deficient number, since it is larger than the sum of its proper divisors (144523).

36212021 is a wasteful number, since it uses less digits than its factorization.

36212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144522.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 36212021 is about 6017.6424785791. The cubic root of 36212021 is about 330.8396767722.

Adding to 36212021 its reverse (12021263), we get a palindrome (48233284).

The spelling of 36212021 in words is "thirty-six million, two hundred twelve thousand, twenty-one".