210101212 has 24 divisors (see below), whose sum is σ = 374613120. Its totient is φ = 103083120.

The previous prime is 210101189. The next prime is 210101273. The reversal of 210101212 is 212101012.

210101212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 62839 + ... + 66097.

It is an arithmetic number, because the mean of its divisors is an integer number (15608880).

Almost surely, 2^210101212 is an apocalyptic number.

It is an amenable number.

210101212 is a deficient number, since it is larger than the sum of its proper divisors (164511908).

210101212 is a wasteful number, since it uses less digits than its factorization.

210101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3559 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 210101212 is about 14494.8684712901. The cubic root of 210101212 is about 594.4876714042.

Adding to 210101212 its reverse (212101012), we get a palindrome (422202224).

It can be divided in two parts, 21010 and 1212, that added together give a palindrome (22222).

The spelling of 210101212 in words is "two hundred ten million, one hundred one thousand, two hundred twelve".