2271722747221 has 4 divisors (see below), whose sum is σ = 2370493301472. Its totient is φ = 2172952192972.

The previous prime is 2271722747213. The next prime is 2271722747303. The reversal of 2271722747221 is 1227472271722.

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 2271722747221 - 2³ = 2271722747213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271722727221) 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, 49385277091 + ... + 49385277136.

It is an arithmetic number, because the mean of its divisors is an integer number (592623325368).

Almost surely, 2^{2271722747221} is an apocalyptic number.

It is an amenable number.

2271722747221 is a deficient number, since it is larger than the sum of its proper divisors (98770554251).

2271722747221 is an equidigital number, since it uses as much as digits as its factorization.

2271722747221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98770554250.

The product of its digits is 614656, while the sum is 46.

The spelling of 2271722747221 in words is "two trillion, two hundred seventy-one billion, seven hundred twenty-two million, seven hundred forty-seven thousand, two hundred twenty-one".