101211021000209 has 4 divisors (see below), whose sum is σ = 101211090616500. Its totient is φ = 101210951383920.

The previous prime is 101211021000121. The next prime is 101211021000289. The reversal of 101211021000209 is 902000120112101.

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 77395918275025 + 23815102725184 = 8797495^2 + 4880072^2 .

It is a cyclic number.

It is not a de Polignac number, because 101211021000209 - 2³² = 101206726032913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101211021000289) 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, 32579834 + ... + 35550915.

It is an arithmetic number, because the mean of its divisors is an integer number (25302772654125).

Almost surely, 2^{101211021000209} is an apocalyptic number.

It is an amenable number.

101211021000209 is a deficient number, since it is larger than the sum of its proper divisors (69616291).

101211021000209 is an equidigital number, since it uses as much as digits as its factorization.

101211021000209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69616290.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 101211021000209 in words is "one hundred one trillion, two hundred eleven billion, twenty-one million, two hundred nine", and thus it is an aban number.