21002211222113 has 16 divisors (see below), whose sum is σ = 22960088616960. Its totient is φ = 19052434030800.

The previous prime is 21002211222107. The next prime is 21002211222121. The reversal of 21002211222113 is 31122211220012.

It is a cyclic number.

It is not a de Polignac number, because 21002211222113 - 2²⁰ = 21002210173537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21002211222413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254509406 + ... + 254591912.

It is an arithmetic number, because the mean of its divisors is an integer number (1435005538560).

Almost surely, 2^{21002211222113} is an apocalyptic number.

It is an amenable number.

21002211222113 is a deficient number, since it is larger than the sum of its proper divisors (1957877394847).

21002211222113 is a wasteful number, since it uses less digits than its factorization.

21002211222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131308.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21002211222113 its reverse (31122211220012), we get a palindrome (52124422442125).

The spelling of 21002211222113 in words is "twenty-one trillion, two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred thirteen".