211212104 has 24 divisors (see below), whose sum is σ = 410162610. Its totient is φ = 101961216.

The previous prime is 211212101. The next prime is 211212121. The reversal of 211212104 is 401212112.

It is a happy number.

211212104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 211120900 + 91204 = 14530^2 + 302^2 .

It is a super-2 number, since 2×211212104² = 89221105752213632, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 8969 + ... + 22424.

Almost surely, 2^211212104 is an apocalyptic number.

It is an amenable number.

211212104 is a deficient number, since it is larger than the sum of its proper divisors (198950506).

211212104 is a wasteful number, since it uses less digits than its factorization.

211212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31457 (or 31424 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 211212104 is about 14533.1381332457. The cubic root of 211212104 is about 595.5335975440.

Adding to 211212104 its reverse (401212112), we get a palindrome (612424216).

The spelling of 211212104 in words is "two hundred eleven million, two hundred twelve thousand, one hundred four".