100100220021221 has 4 divisors (see below), whose sum is σ = 114400251452832. Its totient is φ = 85800188589612.

The previous prime is 100100220021157. The next prime is 100100220021253. The reversal of 100100220021221 is 122120022001001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100100220021221 - 2⁶ = 100100220021157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100100220021196 and 100100220021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100220041221) 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 3 ways as a sum of consecutive naturals, for example, 7150015715795 + ... + 7150015715808.

It is an arithmetic number, because the mean of its divisors is an integer number (28600062863208).

Almost surely, 2^{100100220021221} is an apocalyptic number.

It is an amenable number.

100100220021221 is a deficient number, since it is larger than the sum of its proper divisors (14300031431611).

100100220021221 is an equidigital number, since it uses as much as digits as its factorization.

100100220021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14300031431610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100100220021221 its reverse (122120022001001), we get a palindrome (222220242022222).

The spelling of 100100220021221 in words is "one hundred trillion, one hundred billion, two hundred twenty million, twenty-one thousand, two hundred twenty-one".