5041221216661 has 8 divisors (see below), whose sum is σ = 5764786740800. Its totient is φ = 4318503458688.

The previous prime is 5041221216641. The next prime is 5041221216671. The reversal of 5041221216661 is 1666121221405.

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 5041221216661 - 2²⁵ = 5041187662229 is a prime.

It is a super-2 number, since 2×5041221216661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5041221216661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5041221216601) 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, 211928796 + ... + 211952581.

It is an arithmetic number, because the mean of its divisors is an integer number (720598342600).

Almost surely, 2^{5041221216661} is an apocalyptic number.

It is an amenable number.

5041221216661 is a deficient number, since it is larger than the sum of its proper divisors (723565524139).

5041221216661 is a wasteful number, since it uses less digits than its factorization.

5041221216661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423883083.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 5041221216661 in words is "five trillion, forty-one billion, two hundred twenty-one million, two hundred sixteen thousand, six hundred sixty-one".