1220021212 has 6 divisors (see below), whose sum is σ = 2135037128. Its totient is φ = 610010604.

The previous prime is 1220021203. The next prime is 1220021249. The reversal of 1220021212 is 2121200221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220021192 and 1220021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152502648 + ... + 152502655.

Almost surely, 2^1220021212 is an apocalyptic number.

It is an amenable number.

1220021212 is a deficient number, since it is larger than the sum of its proper divisors (915015916).

1220021212 is a wasteful number, since it uses less digits than its factorization.

1220021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305005307 (or 305005305 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220021212 is about 34928.8020407228. The cubic root of 1220021212 is about 1068.5359229143.

Adding to 1220021212 its reverse (2121200221), we get a palindrome (3341221433).

The spelling of 1220021212 in words is "one billion, two hundred twenty million, twenty-one thousand, two hundred twelve".