211212106 has 16 divisors (see below), whose sum is σ = 362666880. Its totient is φ = 90372240.

The previous prime is 211212101. The next prime is 211212121. The reversal of 211212106 is 601212112.

It is a super-2 number, since 2×211212106² = 89221107441910472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212106.

It is not an unprimeable number, because it can be changed into a prime (211212101) 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, 3121 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (22666680).

Almost surely, 2^211212106 is an apocalyptic number.

211212106 is a deficient number, since it is larger than the sum of its proper divisors (151454774).

211212106 is a wasteful number, since it uses less digits than its factorization.

211212106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24549.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 211212106 is about 14533.1382020540. The cubic root of 211212106 is about 595.5335994237.

Adding to 211212106 its reverse (601212112), we get a palindrome (812424218).

The spelling of 211212106 in words is "two hundred eleven million, two hundred twelve thousand, one hundred six".