100001220022201 has 4 divisors (see below), whose sum is σ = 101888035494372. Its totient is φ = 98114404550032.

The previous prime is 100001220022169. The next prime is 100001220022219. The reversal of 100001220022201 is 102220022100001.

It is a happy number.

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 49523605364601 + 50477614657600 = 7037301^2 + 7104760^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001220022201 - 2⁵ = 100001220022169 is a prime.

It is a super-3 number, since 3×100001220022201³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100001220022261) 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, 943407736006 + ... + 943407736111.

It is an arithmetic number, because the mean of its divisors is an integer number (25472008873593).

Almost surely, 2^{100001220022201} is an apocalyptic number.

It is an amenable number.

100001220022201 is a deficient number, since it is larger than the sum of its proper divisors (1886815472171).

100001220022201 is an equidigital number, since it uses as much as digits as its factorization.

100001220022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886815472170.

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

Adding to 100001220022201 its reverse (102220022100001), we get a palindrome (202221242122202).

The spelling of 100001220022201 in words is "one hundred trillion, one billion, two hundred twenty million, twenty-two thousand, two hundred one".