1221002022213 has 16 divisors (see below), whose sum is σ = 1904096721600. Its totient is φ = 771159171600.

The previous prime is 1221002022209. The next prime is 1221002022241. The reversal of 1221002022213 is 3122202001221.

It is not a de Polignac number, because 1221002022213 - 2² = 1221002022209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221002022283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190059938 + ... + 1190060963.

It is an arithmetic number, because the mean of its divisors is an integer number (119006045100).

Almost surely, 2^{1221002022213} is an apocalyptic number.

It is an amenable number.

1221002022213 is a deficient number, since it is larger than the sum of its proper divisors (683094699387).

1221002022213 is a wasteful number, since it uses less digits than its factorization.

1221002022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380120929 (or 2380120923 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1221002022213 its reverse (3122202001221), we get a palindrome (4343204023434).

The spelling of 1221002022213 in words is "one trillion, two hundred twenty-one billion, two million, twenty-two thousand, two hundred thirteen".