4050644012221 has 4 divisors (see below), whose sum is σ = 4050821936700. Its totient is φ = 4050466087744.

The previous prime is 4050644012201. The next prime is 4050644012243. The reversal of 4050644012221 is 1222104460504.

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 45962643321 + 4004681368900 = 214389^2 + 2001170^2 .

It is a cyclic number.

It is not a de Polignac number, because 4050644012221 - 2³³ = 4042054077629 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 (4050644012201) 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, 88928086 + ... + 88973623.

It is an arithmetic number, because the mean of its divisors is an integer number (1012705484175).

Almost surely, 2^{4050644012221} is an apocalyptic number.

It is an amenable number.

4050644012221 is a deficient number, since it is larger than the sum of its proper divisors (177924479).

4050644012221 is a wasteful number, since it uses less digits than its factorization.

4050644012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177924478.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 4050644012221 its reverse (1222104460504), we get a palindrome (5272748472725).

The spelling of 4050644012221 in words is "four trillion, fifty billion, six hundred forty-four million, twelve thousand, two hundred twenty-one".