212122011 has 8 divisors (see below), whose sum is σ = 285575680. Its totient is φ = 140041512.

The previous prime is 212122007. The next prime is 212122019. The reversal of 212122011 is 110221212.

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

It is not a de Polignac number, because 212122011 - 2² = 212122007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122019) 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, 342931 + ... + 343548.

It is an arithmetic number, because the mean of its divisors is an integer number (35696960).

Almost surely, 2^212122011 is an apocalyptic number.

212122011 is a deficient number, since it is larger than the sum of its proper divisors (73453669).

212122011 is a wasteful number, since it uses less digits than its factorization.

212122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686585.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 212122011 is about 14564.4090508335. The cubic root of 212122011 is about 596.3875635991.

Adding to 212122011 its reverse (110221212), we get a palindrome (322343223).

The spelling of 212122011 in words is "two hundred twelve million, one hundred twenty-two thousand, eleven".