1223220212212 has 6 divisors (see below), whose sum is σ = 2140635371378. Its totient is φ = 611610106104.

The previous prime is 1223220212209. The next prime is 1223220212237. The reversal of 1223220212212 is 2122120223221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1086109971556 + 137110240656 = 1042166^2 + 370284^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152902526523 + ... + 152902526530.

Almost surely, 2^{1223220212212} is an apocalyptic number.

It is an amenable number.

1223220212212 is a deficient number, since it is larger than the sum of its proper divisors (917415159166).

1223220212212 is a wasteful number, since it uses less digits than its factorization.

1223220212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305805053057 (or 305805053055 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1223220212212 its reverse (2122120223221), we get a palindrome (3345340435433).

The spelling of 1223220212212 in words is "one trillion, two hundred twenty-three billion, two hundred twenty million, two hundred twelve thousand, two hundred twelve".