212021121106 has 8 divisors (see below), whose sum is σ = 334770191280. Its totient is φ = 100431057348.

The previous prime is 212021121097. The next prime is 212021121107. The reversal of 212021121106 is 601121120212.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (212021121107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789751556 + ... + 2789751631.

It is an arithmetic number, because the mean of its divisors is an integer number (41846273910).

Almost surely, 2^212021121106 is an apocalyptic number.

212021121106 is a deficient number, since it is larger than the sum of its proper divisors (122749070174).

212021121106 is a wasteful number, since it uses less digits than its factorization.

212021121106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579503208.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 212021121106 its reverse (601121120212), we get a palindrome (813142241318).

The spelling of 212021121106 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred six".