100211012202221 has 4 divisors (see below), whose sum is σ = 100211330872572. Its totient is φ = 100210693531872.

The previous prime is 100211012202211. The next prime is 100211012202227. The reversal of 100211012202221 is 122202210112001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29883835825321 + 70327176376900 = 5466611^2 + 8386130^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211012202221 - 2³⁴ = 100193832333037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100211012202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211012202227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158863010 + ... + 159492563.

It is an arithmetic number, because the mean of its divisors is an integer number (25052832718143).

Almost surely, 2^{100211012202221} is an apocalyptic number.

It is an amenable number.

100211012202221 is a deficient number, since it is larger than the sum of its proper divisors (318670351).

100211012202221 is an equidigital number, since it uses as much as digits as its factorization.

100211012202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318670350.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100211012202221 its reverse (122202210112001), we get a palindrome (222413222314222).

The spelling of 100211012202221 in words is "one hundred trillion, two hundred eleven billion, twelve million, two hundred two thousand, two hundred twenty-one".