1220022221212 has 6 divisors (see below), whose sum is σ = 2135038887128. Its totient is φ = 610011110604.

The previous prime is 1220022221179. The next prime is 1220022221279. The reversal of 1220022221212 is 2121222200221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220022221212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152502777648 + ... + 152502777655.

Almost surely, 2^{1220022221212} is an apocalyptic number.

It is an amenable number.

1220022221212 is a deficient number, since it is larger than the sum of its proper divisors (915016665916).

1220022221212 is a wasteful number, since it uses less digits than its factorization.

1220022221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305005555307 (or 305005555305 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1220022221212 its reverse (2121222200221), we get a palindrome (3341244421433).

The spelling of 1220022221212 in words is "one trillion, two hundred twenty billion, twenty-two million, two hundred twenty-one thousand, two hundred twelve".