2216644126421 has 8 divisors (see below), whose sum is σ = 2220037207200. Its totient is φ = 2213252110800.

The previous prime is 2216644126397. The next prime is 2216644126423. The reversal of 2216644126421 is 1246214466122.

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 2216644126421 - 2⁶ = 2216644126357 is a prime.

It is a super-2 number, since 2×2216644126421² (a number of 25 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 (2216644126423) 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, 3949970 + ... + 4476108.

It is an arithmetic number, because the mean of its divisors is an integer number (277504650900).

Almost surely, 2^{2216644126421} is an apocalyptic number.

It is an amenable number.

2216644126421 is a deficient number, since it is larger than the sum of its proper divisors (3393080779).

2216644126421 is an equidigital number, since it uses as much as digits as its factorization.

2216644126421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532579.

The product of its digits is 221184, while the sum is 41.

The spelling of 2216644126421 in words is "two trillion, two hundred sixteen billion, six hundred forty-four million, one hundred twenty-six thousand, four hundred twenty-one".