1222313312221 has 8 divisors (see below), whose sum is σ = 1228711434624. Its totient is φ = 1215915859200.

The previous prime is 1222313312179. The next prime is 1222313312237. The reversal of 1222313312221 is 1222133132221.

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 1222313312221 - 2⁷ = 1222313312093 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 (1222313312261) 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, 3731196 + ... + 4045546.

It is an arithmetic number, because the mean of its divisors is an integer number (153588929328).

Almost surely, 2^{1222313312221} is an apocalyptic number.

It is an amenable number.

1222313312221 is a deficient number, since it is larger than the sum of its proper divisors (6398122403).

1222313312221 is a wasteful number, since it uses less digits than its factorization.

1222313312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334691.

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

Adding to 1222313312221 its reverse (1222133132221), we get a palindrome (2444446444442).

The spelling of 1222313312221 in words is "one trillion, two hundred twenty-two billion, three hundred thirteen million, three hundred twelve thousand, two hundred twenty-one".