101220202109 has 4 divisors (see below), whose sum is σ = 109006371516. Its totient is φ = 93434032704.

The previous prime is 101220202093. The next prime is 101220202117. The reversal of 101220202109 is 901202022101.

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 4501068100 + 96719134009 = 67090^2 + 310997^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220202109 - 2⁴ = 101220202093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220202609) 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, 3893084684 + ... + 3893084709.

It is an arithmetic number, because the mean of its divisors is an integer number (27251592879).

Almost surely, 2^101220202109 is an apocalyptic number.

It is an amenable number.

101220202109 is a deficient number, since it is larger than the sum of its proper divisors (7786169407).

101220202109 is an equidigital number, since it uses as much as digits as its factorization.

101220202109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7786169406.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 101220202109 in words is "one hundred one billion, two hundred twenty million, two hundred two thousand, one hundred nine".