36020021021 has 4 divisors (see below), whose sum is σ = 36219026844. Its totient is φ = 35821015200.

The previous prime is 36020021017. The next prime is 36020021041. The reversal of 36020021021 is 12012002063.

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 266505625 + 35753515396 = 16325^2 + 189086^2 .

It is a cyclic number.

It is not a de Polignac number, because 36020021021 - 2² = 36020021017 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 (36020021041) 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, 99502640 + ... + 99503001.

It is an arithmetic number, because the mean of its divisors is an integer number (9054756711).

Almost surely, 2^36020021021 is an apocalyptic number.

It is an amenable number.

36020021021 is a deficient number, since it is larger than the sum of its proper divisors (199005823).

36020021021 is a wasteful number, since it uses less digits than its factorization.

36020021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199005822.

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

Adding to 36020021021 its reverse (12012002063), we get a palindrome (48032023084).

The spelling of 36020021021 in words is "thirty-six billion, twenty million, twenty-one thousand, twenty-one".