212122111109 has 8 divisors (see below), whose sum is σ = 221377060800. Its totient is φ = 202869848896.

The previous prime is 212122111081. The next prime is 212122111127. The reversal of 212122111109 is 901111221212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212122111109 - 2³⁶ = 143402634373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122111009) 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, 509732 + ... + 827085.

It is an arithmetic number, because the mean of its divisors is an integer number (27672132600).

Almost surely, 2^212122111109 is an apocalyptic number.

It is an amenable number.

212122111109 is a deficient number, since it is larger than the sum of its proper divisors (9254949691).

212122111109 is a wasteful number, since it uses less digits than its factorization.

212122111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343739.

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

The spelling of 212122111109 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred eleven thousand, one hundred nine".