20100221210207 has 2 divisors, whose sum is σ = 20100221210208. Its totient is φ = 20100221210206.

The previous prime is 20100221210077. The next prime is 20100221210213. The reversal of 20100221210207 is 70201212200102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20100221210207 - 2⁸ = 20100221209951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100221210257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050110605103 + 10050110605104.

It is an arithmetic number, because the mean of its divisors is an integer number (10050110605104).

Almost surely, 2^{20100221210207} is an apocalyptic number.

20100221210207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100221210207 is an equidigital number, since it uses as much as digits as its factorization.

20100221210207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 20100221210207 its reverse (70201212200102), we get a palindrome (90301433410309).

The spelling of 20100221210207 in words is "twenty trillion, one hundred billion, two hundred twenty-one million, two hundred ten thousand, two hundred seven".