212120110109 has 16 divisors (see below), whose sum is σ = 224501929344. Its totient is φ = 200004710400.

The previous prime is 212120110087. The next prime is 212120110133. The reversal of 212120110109 is 901011021212.

It is a cyclic number.

It is not a de Polignac number, because 212120110109 - 2²⁴ = 212103332893 is a prime.

It is a super-2 number, since 2×212120110109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120110159) 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, 3005789 + ... + 3075549.

It is an arithmetic number, because the mean of its divisors is an integer number (14031370584).

Almost surely, 2^212120110109 is an apocalyptic number.

It is an amenable number.

212120110109 is a deficient number, since it is larger than the sum of its proper divisors (12381819235).

212120110109 is a wasteful number, since it uses less digits than its factorization.

212120110109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71668.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 212120110109 in words is "two hundred twelve billion, one hundred twenty million, one hundred ten thousand, one hundred nine".