36221233021 has 4 divisors (see below), whose sum is σ = 36237114844. Its totient is φ = 36205351200.

The previous prime is 36221232979. The next prime is 36221233031. The reversal of 36221233021 is 12033212263.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8079492996 + 28141740025 = 89886^2 + 167755^2 .

It is a cyclic number.

It is not a de Polignac number, because 36221233021 - 2⁷ = 36221232893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36221233031) 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, 7937490 + ... + 7942051.

It is an arithmetic number, because the mean of its divisors is an integer number (9059278711).

Almost surely, 2^36221233021 is an apocalyptic number.

It is an amenable number.

36221233021 is a deficient number, since it is larger than the sum of its proper divisors (15881823).

36221233021 is a wasteful number, since it uses less digits than its factorization.

36221233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15881822.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 36221233021 its reverse (12033212263), we get a palindrome (48254445284).

The spelling of 36221233021 in words is "thirty-six billion, two hundred twenty-one million, two hundred thirty-three thousand, twenty-one".