1221322122106 has 8 divisors (see below), whose sum is σ = 1832183712180. Its totient is φ = 610594218048.

The previous prime is 1221322122103. The next prime is 1221322122127. The reversal of 1221322122106 is 6012212231221.

It can be written as a sum of positive squares in 2 ways, for example, as 1177908649225 + 43413472881 = 1085315^2 + 208359^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1221322122101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33398661 + ... + 33435208.

Almost surely, 2^{1221322122106} is an apocalyptic number.

1221322122106 is a deficient number, since it is larger than the sum of its proper divisors (610861590074).

1221322122106 is an equidigital number, since it uses as much as digits as its factorization.

1221322122106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66843008.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1221322122106 its reverse (6012212231221), we get a palindrome (7233534353327).

The spelling of 1221322122106 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-two thousand, one hundred six".