1212221201222 has 4 divisors (see below), whose sum is σ = 1818331801836. Its totient is φ = 606110600610.

The previous prime is 1212221201209. The next prime is 1212221201287. The reversal of 1212221201222 is 2221021222121.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1212221201222² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212221201194 and 1212221201203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303055300304 + ... + 303055300307.

It is an arithmetic number, because the mean of its divisors is an integer number (454582950459).

Almost surely, 2^{1212221201222} is an apocalyptic number.

1212221201222 is a deficient number, since it is larger than the sum of its proper divisors (606110600614).

1212221201222 is an equidigital number, since it uses as much as digits as its factorization.

1212221201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606110600613.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212221201222 its reverse (2221021222121), we get a palindrome (3433242423343).

The spelling of 1212221201222 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-two".