3721336221 has 8 divisors (see below), whose sum is σ = 5177511360. Its totient is φ = 2373025952.

The previous prime is 3721336211. The next prime is 3721336253. The reversal of 3721336221 is 1226331273.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3721336221 - 2²⁵ = 3687781789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721336211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26966136 + ... + 26966273.

It is an arithmetic number, because the mean of its divisors is an integer number (647188920).

Almost surely, 2^3721336221 is an apocalyptic number.

It is an amenable number.

3721336221 is a deficient number, since it is larger than the sum of its proper divisors (1456175139).

3721336221 is a wasteful number, since it uses less digits than its factorization.

3721336221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53932435.

The product of its digits is 9072, while the sum is 30.

The square root of 3721336221 is about 61002.7558475845. The cubic root of 3721336221 is about 1549.6476786455.

Adding to 3721336221 its reverse (1226331273), we get a palindrome (4947667494).

The spelling of 3721336221 in words is "three billion, seven hundred twenty-one million, three hundred thirty-six thousand, two hundred twenty-one".