3650021055221 has 4 divisors (see below), whose sum is σ = 3673269597132. Its totient is φ = 3626772513312.

The previous prime is 3650021055209. The next prime is 3650021055223. The reversal of 3650021055221 is 1225501200563.

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 2626506422500 + 1023514632721 = 1620650^2 + 1011689^2 .

It is a cyclic number.

It is not a de Polignac number, because 3650021055221 - 2⁶ = 3650021055157 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 (3650021055223) 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, 11624270720 + ... + 11624271033.

It is an arithmetic number, because the mean of its divisors is an integer number (918317399283).

Almost surely, 2^{3650021055221} is an apocalyptic number.

It is an amenable number.

3650021055221 is a deficient number, since it is larger than the sum of its proper divisors (23248541911).

3650021055221 is a wasteful number, since it uses less digits than its factorization.

3650021055221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23248541910.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 3650021055221 its reverse (1225501200563), we get a palindrome (4875522255784).

The spelling of 3650021055221 in words is "three trillion, six hundred fifty billion, twenty-one million, fifty-five thousand, two hundred twenty-one".