3816613134221 has 4 divisors (see below), whose sum is σ = 3846665206272. Its totient is φ = 3786561062172.

The previous prime is 3816613134209. The next prime is 3816613134233. The reversal of 3816613134221 is 1224313166183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3816613134209) and next prime (3816613134233).

It is a cyclic number.

It is not a de Polignac number, because 3816613134221 - 2¹⁰ = 3816613133197 is a prime.

It is a super-2 number, since 2×3816613134221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3816613334221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15026035835 + ... + 15026036088.

It is an arithmetic number, because the mean of its divisors is an integer number (961666301568).

Almost surely, 2^{3816613134221} is an apocalyptic number.

It is an amenable number.

3816613134221 is a deficient number, since it is larger than the sum of its proper divisors (30052072051).

3816613134221 is a wasteful number, since it uses less digits than its factorization.

3816613134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30052072050.

The product of its digits is 124416, while the sum is 41.

The spelling of 3816613134221 in words is "three trillion, eight hundred sixteen billion, six hundred thirteen million, one hundred thirty-four thousand, two hundred twenty-one".