210111212 has 12 divisors (see below), whose sum is σ = 368721360. Its totient is φ = 104762256.

The previous prime is 210111203. The next prime is 210111227. The reversal of 210111212 is 212111012.

It is a junction number, because it is equal to n+sod(n) for n = 210111193 and 210111202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71723 + ... + 74594.

It is an arithmetic number, because the mean of its divisors is an integer number (30726780).

Almost surely, 2^210111212 is an apocalyptic number.

It is an amenable number.

210111212 is a deficient number, since it is larger than the sum of its proper divisors (158610148).

210111212 is a wasteful number, since it uses less digits than its factorization.

210111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146680 (or 146678 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 210111212 is about 14495.2134168490. The cubic root of 210111212 is about 594.4971030211.

Adding to 210111212 its reverse (212111012), we get a palindrome (422222224).

The spelling of 210111212 in words is "two hundred ten million, one hundred eleven thousand, two hundred twelve".