220101212 has 12 divisors (see below), whose sum is σ = 385324800. Its totient is φ = 110008416.

The previous prime is 220101181. The next prime is 220101221. The reversal of 220101212 is 212101022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 220101193 and 220101202.

It is a congruent number.

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, 3173 + ... + 21219.

It is an arithmetic number, because the mean of its divisors is an integer number (32110400).

Almost surely, 2^220101212 is an apocalyptic number.

It is an amenable number.

220101212 is a deficient number, since it is larger than the sum of its proper divisors (165223588).

220101212 is a wasteful number, since it uses less digits than its factorization.

220101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100 (or 21098 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 220101212 is about 14835.8084376956. The cubic root of 220101212 is about 603.7736348941.

Adding to 220101212 its reverse (212101022), we get a palindrome (432202234).

The spelling of 220101212 in words is "two hundred twenty million, one hundred one thousand, two hundred twelve".