212111106 has 16 divisors (see below), whose sum is σ = 442666944. Its totient is φ = 67629584.

The previous prime is 212111101. The next prime is 212111111. The reversal of 212111106 is 601111212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212111101) and next prime (212111111).

It is a super-2 number, since 2×212111106² = 89982242577086472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768381 + ... + 768656.

It is an arithmetic number, because the mean of its divisors is an integer number (27666684).

Almost surely, 2^212111106 is an apocalyptic number.

212111106 is an abundant number, since it is smaller than the sum of its proper divisors (230555838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212111106 is a wasteful number, since it uses less digits than its factorization.

212111106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537065.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 212111106 is about 14564.0346744987. The cubic root of 212111106 is about 596.3773435096.

Adding to 212111106 its reverse (601111212), we get a palindrome (813222318).

The spelling of 212111106 in words is "two hundred twelve million, one hundred eleven thousand, one hundred six".