1221122120122 has 8 divisors (see below), whose sum is σ = 1831836251700. Its totient is φ = 610510036224.

The previous prime is 1221122120083. The next prime is 1221122120131. The reversal of 1221122120122 is 2210212211221.

It can be written as a sum of positive squares in 2 ways, for example, as 1075557742281 + 145564377841 = 1037091^2 + 381529^2 .

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

It is a super-2 number, since 2×1221122120122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221122120122.

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 in 3 ways as a sum of consecutive naturals, for example, 25481997 + ... + 25529872.

Almost surely, 2^{1221122120122} is an apocalyptic number.

1221122120122 is a deficient number, since it is larger than the sum of its proper divisors (610714131578).

1221122120122 is a wasteful number, since it uses less digits than its factorization.

1221122120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51023840.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221122120122 its reverse (2210212211221), we get a palindrome (3431334331343).

The spelling of 1221122120122 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred twenty-two".