1220121020212 has 12 divisors (see below), whose sum is σ = 2208839778180. Its totient is φ = 589023940736.

The previous prime is 1220121020177. The next prime is 1220121020231. The reversal of 1220121020212 is 2120201210221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 656741676816 + 563379343396 = 810396^2 + 750586^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5259142213 + ... + 5259142444.

It is an arithmetic number, because the mean of its divisors is an integer number (184069981515).

Almost surely, 2^{1220121020212} is an apocalyptic number.

It is an amenable number.

1220121020212 is a deficient number, since it is larger than the sum of its proper divisors (988718757968).

1220121020212 is a wasteful number, since it uses less digits than its factorization.

1220121020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518284690 (or 10518284688 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220121020212 its reverse (2120201210221), we get a palindrome (3340322230433).

The spelling of 1220121020212 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, twenty thousand, two hundred twelve".