101221120011209 has 16 divisors (see below), whose sum is σ = 117263405350080. Its totient is φ = 86404614428160.

The previous prime is 101221120011203. The next prime is 101221120011307. The reversal of 101221120011209 is 902110021122101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101221120011209 - 2⁸ = 101221120010953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (101221120011203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2142947972 + ... + 2142995205.

It is an arithmetic number, because the mean of its divisors is an integer number (7328962834380).

Almost surely, 2^{101221120011209} is an apocalyptic number.

101221120011209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

101221120011209 is a deficient number, since it is larger than the sum of its proper divisors (16042285338871).

101221120011209 is a wasteful number, since it uses less digits than its factorization.

101221120011209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285943320.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 101221120011209 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twenty million, eleven thousand, two hundred nine".