20102200001221 has 16 divisors (see below), whose sum is σ = 22945670060544. Its totient is φ = 17446294220544.

The previous prime is 20102200001179. The next prime is 20102200001227. The reversal of 20102200001221 is 12210000220102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102200001221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102200001227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 46818445 + ... + 47245858.

It is an arithmetic number, because the mean of its divisors is an integer number (1434104378784).

Almost surely, 2^{20102200001221} is an apocalyptic number.

It is an amenable number.

20102200001221 is a deficient number, since it is larger than the sum of its proper divisors (2843470059323).

20102200001221 is a wasteful number, since it uses less digits than its factorization.

20102200001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94065300.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20102200001221 its reverse (12210000220102), we get a palindrome (32312200221323).

The spelling of 20102200001221 in words is "twenty trillion, one hundred two billion, two hundred million, one thousand, two hundred twenty-one".