2211611583221 has 16 divisors (see below), whose sum is σ = 2405091087360. Its totient is φ = 2025179285760.

The previous prime is 2211611583193. The next prime is 2211611583241. The reversal of 2211611583221 is 1223851161122.

It is a de Polignac number, because none of the positive numbers 2^k-2211611583221 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 (2211611583241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20748500 + ... + 20854818.

It is an arithmetic number, because the mean of its divisors is an integer number (150318192960).

Almost surely, 2^{2211611583221} is an apocalyptic number.

It is an amenable number.

2211611583221 is a deficient number, since it is larger than the sum of its proper divisors (193479504139).

2211611583221 is a wasteful number, since it uses less digits than its factorization.

2211611583221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139444.

The product of its digits is 11520, while the sum is 35.

The spelling of 2211611583221 in words is "two trillion, two hundred eleven billion, six hundred eleven million, five hundred eighty-three thousand, two hundred twenty-one".