211222100101009 has 4 divisors (see below), whose sum is σ = 216373858640100. Its totient is φ = 206070341561920.

The previous prime is 211222100101003. The next prime is 211222100101079. The reversal of 211222100101009 is 900101001222112.

211222100101009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 27532110881025 + 183689989219984 = 5247105^2 + 13553228^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222100101009 - 2³⁷ = 211084661147537 is a prime.

It is a super-2 number, since 2×211222100101009² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211222100101003) 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, 2575879269484 + ... + 2575879269565.

It is an arithmetic number, because the mean of its divisors is an integer number (54093464660025).

Almost surely, 2^{211222100101009} is an apocalyptic number.

It is an amenable number.

211222100101009 is a deficient number, since it is larger than the sum of its proper divisors (5151758539091).

211222100101009 is an equidigital number, since it uses as much as digits as its factorization.

211222100101009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151758539090.

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

The spelling of 211222100101009 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred million, one hundred one thousand, nine".