1022221212212 has 6 divisors (see below), whose sum is σ = 1788887121378. Its totient is φ = 511110606104.

The previous prime is 1022221212179. The next prime is 1022221212217. The reversal of 1022221212212 is 2122121222201.

It can be written as a sum of positive squares in only one way, i.e., 566698806436 + 455522405776 = 752794^2 + 674924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022221212217) by changing a digit.

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 as a sum of consecutive naturals, namely, 127777651523 + ... + 127777651530.

It is an arithmetic number, because the mean of its divisors is an integer number (298147853563).

Almost surely, 2^{1022221212212} is an apocalyptic number.

It is an amenable number.

1022221212212 is a deficient number, since it is larger than the sum of its proper divisors (766665909166).

1022221212212 is a wasteful number, since it uses less digits than its factorization.

1022221212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255555303057 (or 255555303055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1022221212212 its reverse (2122121222201), we get a palindrome (3144342434413).

It can be divided in two parts, 10 and 22221212212, that added together give a palindrome (22221212222).

The spelling of 1022221212212 in words is "one trillion, twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".