212021120109 has 8 divisors (see below), whose sum is σ = 282713229792. Its totient is φ = 141338211920.

The previous prime is 212021120093. The next prime is 212021120249. The reversal of 212021120109 is 901021120212.

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 212021120109 - 2⁴ = 212021120093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021110109) 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, 2246427 + ... + 2338904.

It is an arithmetic number, because the mean of its divisors is an integer number (35339153724).

Almost surely, 2^212021120109 is an apocalyptic number.

It is an amenable number.

212021120109 is a deficient number, since it is larger than the sum of its proper divisors (70692109683).

212021120109 is a wasteful number, since it uses less digits than its factorization.

212021120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600747.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 212021120109 in words is "two hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred nine".