101220011209 has 8 divisors (see below), whose sum is σ = 106667519040. Its totient is φ = 95784517296.

The previous prime is 101220011147. The next prime is 101220011237. The reversal of 101220011209 is 902110022101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101220011209 - 2¹¹ = 101220009161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220011309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2986174 + ... + 3019879.

It is an arithmetic number, because the mean of its divisors is an integer number (13333439880).

Almost surely, 2^101220011209 is an apocalyptic number.

101220011209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

101220011209 is a deficient number, since it is larger than the sum of its proper divisors (5447507831).

101220011209 is an equidigital number, since it uses as much as digits as its factorization.

101220011209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006959.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 101220011209 in words is "one hundred one billion, two hundred twenty million, eleven thousand, two hundred nine".