1221122202122 has 8 divisors (see below), whose sum is σ = 1832540437956. Its totient is φ = 610275389472.

The previous prime is 1221122202119. The next prime is 1221122202161. The reversal of 1221122202122 is 2212022211221.

It can be written as a sum of positive squares in 2 ways, for example, as 979128061081 + 241994141041 = 989509^2 + 491929^2 .

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

It is a super-2 number, since 2×1221122202122² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221122202094 and 1221122202103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142850453 + ... + 142859000.

Almost surely, 2^{1221122202122} is an apocalyptic number.

1221122202122 is a deficient number, since it is larger than the sum of its proper divisors (611418235834).

1221122202122 is a wasteful number, since it uses less digits than its factorization.

1221122202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285711592.

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

Adding to 1221122202122 its reverse (2212022211221), we get a palindrome (3433144413343).

Subtracting 1221122202122 from its reverse (2212022211221), we obtain a palindrome (990900009099).

The spelling of 1221122202122 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-two".