2221332131221 has 16 divisors (see below), whose sum is σ = 2573866948608. Its totient is φ = 1877606352000.

The previous prime is 2221332131203. The next prime is 2221332131233. The reversal of 2221332131221 is 1221312331222.

It is a cyclic number.

It is not a de Polignac number, because 2221332131221 - 2⁹ = 2221332130709 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 (2221332131521) 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, 2761356 + ... + 3473866.

It is an arithmetic number, because the mean of its divisors is an integer number (160866684288).

Almost surely, 2^{2221332131221} is an apocalyptic number.

It is an amenable number.

2221332131221 is a deficient number, since it is larger than the sum of its proper divisors (352534817387).

2221332131221 is an equidigital number, since it uses as much as digits as its factorization.

2221332131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718692.

The product of its digits is 1728, while the sum is 25.

Adding to 2221332131221 its reverse (1221312331222), we get a palindrome (3442644462443).

The spelling of 2221332131221 in words is "two trillion, two hundred twenty-one billion, three hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".