221212020012109 has 8 divisors (see below), whose sum is σ = 253150373297408. Its totient is φ = 189357825762000.

The previous prime is 221212020012103. The next prime is 221212020012199. The reversal of 221212020012109 is 901210020212122.

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 221212020012109 - 2⁵ = 221212020012077 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 (221212020012103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21039753162 + ... + 21039763675.

It is an arithmetic number, because the mean of its divisors is an integer number (31643796662176).

Almost surely, 2^{221212020012109} is an apocalyptic number.

It is an amenable number.

221212020012109 is a deficient number, since it is larger than the sum of its proper divisors (31938353285299).

221212020012109 is an equidigital number, since it uses as much as digits as its factorization.

221212020012109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42079517595.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 221212020012109 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty million, twelve thousand, one hundred nine".