100220101 has 2 divisors, whose sum is σ = 100220102.
Its totient is φ = 100220100.
The previous prime is 100220089. The next prime is 100220119. The reversal of 100220101 is 101022001.
Adding to 100220101 its reverse (101022001), we get a palindrome (201242102).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 99980001 + 240100 = 9999^2 + 490^2
It is a cyclic number.
It is not a de Polignac number, because 100220101 - 217 = 100089029 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (100221101) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110050 + 50110051.
It is an arithmetic number, because the mean of its divisors is an integer number (50110051).
Almost surely, 2100220101 is an apocalyptic number.
It is an amenable number.
100220101 is a deficient number, since it is larger than the sum of its proper divisors (1).
100220101 is an equidigital number, since it uses as much as digits as its factorization.
100220101 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 100220101 is about 10010.9990010987.
Note that the first 3 decimals coincide.
The cubic root of 100220101 is about 464.4991732707.
The spelling of 100220101 in words is "one hundred million, two hundred twenty thousand, one hundred one".