4227156722221 has 4 divisors (see below), whose sum is σ = 4248398716000. Its totient is φ = 4205914728444.

The previous prime is 4227156722219. The next prime is 4227156722279. The reversal of 4227156722221 is 1222276517224.

4227156722221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 4227156722221 - 2¹ = 4227156722219 is a prime.

It is a super-3 number, since 3×4227156722221³ (a number of 39 digits) contains 333 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 (4227156722521) 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, 10620996591 + ... + 10620996988.

It is an arithmetic number, because the mean of its divisors is an integer number (1062099679000).

Almost surely, 2^{4227156722221} is an apocalyptic number.

It is an amenable number.

4227156722221 is a deficient number, since it is larger than the sum of its proper divisors (21241993779).

4227156722221 is a wasteful number, since it uses less digits than its factorization.

4227156722221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241993778.

The product of its digits is 376320, while the sum is 43.

The spelling of 4227156722221 in words is "four trillion, two hundred twenty-seven billion, one hundred fifty-six million, seven hundred twenty-two thousand, two hundred twenty-one".