1222302312221 has 8 divisors (see below), whose sum is σ = 1294476670584. Its totient is φ = 1150158423040.

The previous prime is 1222302312211. The next prime is 1222302312223. The reversal of 1222302312221 is 1222132032221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 679223222500 + 543079089721 = 824150^2 + 736939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222302312221 is a prime.

It is a super-3 number, since 3×1222302312221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222302312223) 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, 7534670 + ... + 7695183.

It is an arithmetic number, because the mean of its divisors is an integer number (161809583823).

Almost surely, 2^{1222302312221} is an apocalyptic number.

It is an amenable number.

1222302312221 is a deficient number, since it is larger than the sum of its proper divisors (72174358363).

1222302312221 is a wasteful number, since it uses less digits than its factorization.

1222302312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15234591.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1222302312221 its reverse (1222132032221), we get a palindrome (2444434344442).

The spelling of 1222302312221 in words is "one trillion, two hundred twenty-two billion, three hundred two million, three hundred twelve thousand, two hundred twenty-one".