101002020209 has 4 divisors (see below), whose sum is σ = 105393412416. Its totient is φ = 96610628004.

The previous prime is 101002020199. The next prime is 101002020211. The reversal of 101002020209 is 902020200101.

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 a cyclic number.

It is not a de Polignac number, because 101002020209 - 2²⁰ = 101000971633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101002023209) 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, 2195696069 + ... + 2195696114.

It is an arithmetic number, because the mean of its divisors is an integer number (26348353104).

Almost surely, 2^101002020209 is an apocalyptic number.

It is an amenable number.

101002020209 is a deficient number, since it is larger than the sum of its proper divisors (4391392207).

101002020209 is an equidigital number, since it uses as much as digits as its factorization.

101002020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391392206.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 101002020209 in words is "one hundred one billion, two million, twenty thousand, two hundred nine".