2221232051221 has 8 divisors (see below), whose sum is σ = 2225211851520. Its totient is φ = 2217254725872.

The previous prime is 2221232051219. The next prime is 2221232051237. The reversal of 2221232051221 is 1221502321222.

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 2221232051221 - 2¹ = 2221232051219 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 (2221232051201) 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, 1182531 + ... + 2416783.

It is an arithmetic number, because the mean of its divisors is an integer number (278151481440).

Almost surely, 2^{2221232051221} is an apocalyptic number.

It is an amenable number.

2221232051221 is a deficient number, since it is larger than the sum of its proper divisors (3979800299).

2221232051221 is a wasteful number, since it uses less digits than its factorization.

2221232051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237475.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2221232051221 its reverse (1221502321222), we get a palindrome (3442734372443).

The spelling of 2221232051221 in words is "two trillion, two hundred twenty-one billion, two hundred thirty-two million, fifty-one thousand, two hundred twenty-one".