1221002201122 has 12 divisors (see below), whose sum is σ = 2013139993158. Its totient is φ = 555001000400.

The previous prime is 1221002201101. The next prime is 1221002201179. The reversal of 1221002201122 is 2211022001221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1127226000681 + 93776200441 = 1061709^2 + 306229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221002201096 and 1221002201105.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2522731579 + ... + 2522732062.

Almost surely, 2^{1221002201122} is an apocalyptic number.

1221002201122 is a deficient number, since it is larger than the sum of its proper divisors (792137792036).

1221002201122 is a wasteful number, since it uses less digits than its factorization.

1221002201122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045463665 (or 5045463654 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221002201122 its reverse (2211022001221), we get a palindrome (3432024202343).

The spelling of 1221002201122 in words is "one trillion, two hundred twenty-one billion, two million, two hundred one thousand, one hundred twenty-two".