122211221312 has 14 divisors (see below), whose sum is σ = 242512892418. Its totient is φ = 61105610624.

The previous prime is 122211221309. The next prime is 122211221333. The reversal of 122211221312 is 213122112221.

It can be written as a sum of positive squares in only one way, i.e., 104055275776 + 18155945536 = 322576^2 + 134744^2 .

It is a super-2 number, since 2×122211221312² (a number of 23 digits) contains 22 as substring.

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, 954775103 + ... + 954775230.

Almost surely, 2^122211221312 is an apocalyptic number.

It is an amenable number.

122211221312 is a deficient number, since it is larger than the sum of its proper divisors (120301671106).

122211221312 is an equidigital number, since it uses as much as digits as its factorization.

122211221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909550345 (or 1909550335 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

Adding to 122211221312 its reverse (213122112221), we get a palindrome (335333333533).

The spelling of 122211221312 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, three hundred twelve".