1221230212 has 12 divisors (see below), whose sum is σ = 2157902656. Its totient is φ = 604686600.

The previous prime is 1221230189. The next prime is 1221230221. The reversal of 1221230212 is 2120321221.

It is a happy 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, 1481664 + ... + 1482487.

Almost surely, 2^1221230212 is an apocalyptic number.

It is an amenable number.

1221230212 is a deficient number, since it is larger than the sum of its proper divisors (936672444).

1221230212 is a wasteful number, since it uses less digits than its factorization.

1221230212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964258 (or 2964256 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221230212 is about 34946.1043894738. The cubic root of 1221230212 is about 1068.8887674449. Note that the first 3 decimals are identical.

Adding to 1221230212 its reverse (2120321221), we get a palindrome (3341551433).

It can be divided in two parts, 12212 and 30212, that added together give a palindrome (42424).

The spelling of 1221230212 in words is "one billion, two hundred twenty-one million, two hundred thirty thousand, two hundred twelve".