211212196 has 24 divisors (see below), whose sum is σ = 399814520. Its totient is φ = 97051392.

The previous prime is 211212181. The next prime is 211212203. The reversal of 211212196 is 691212112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 81252196 + 129960000 = 9014^2 + 11400^2 .

It is a super-2 number, since 2×211212196² = 89221183478284832, 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 211212196.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3040 + ... + 20776.

Almost surely, 2^211212196 is an apocalyptic number.

211212196 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

211212196 is a deficient number, since it is larger than the sum of its proper divisors (188602324).

211212196 is a wasteful number, since it uses less digits than its factorization.

211212196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17983 (or 17981 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 211212196 is about 14533.1412984255. The cubic root of 211212196 is about 595.5336840117.

The spelling of 211212196 in words is "two hundred eleven million, two hundred twelve thousand, one hundred ninety-six".