20212112010109 has 2 divisors, whose sum is σ = 20212112010110. Its totient is φ = 20212112010108.

The previous prime is 20212112010091. The next prime is 20212112010119. The reversal of 20212112010109 is 90101021121202.

Together with previous prime (20212112010091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19152684398884 + 1059427611225 = 4376378^2 + 1029285^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212112010109 - 2²⁵ = 20212078455677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212112010109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212112010119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106056005054 + 10106056005055.

It is an arithmetic number, because the mean of its divisors is an integer number (10106056005055).

Almost surely, 2^{20212112010109} is an apocalyptic number.

It is an amenable number.

20212112010109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212112010109 is an equidigital number, since it uses as much as digits as its factorization.

20212112010109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20212112010109 in words is "twenty trillion, two hundred twelve billion, one hundred twelve million, ten thousand, one hundred nine".