1022012220221 has 12 divisors (see below), whose sum is σ = 1025890661460. Its totient is φ = 1018148208000.

The previous prime is 1022012220211. The next prime is 1022012220241. The reversal of 1022012220221 is 1220222102201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 49048960900 + 972963259321 = 221470^2 + 986389^2 .

It is not a de Polignac number, because 1022012220221 - 2³⁴ = 1004832351037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022012220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022012220211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301565795 + ... + 301569183.

It is an arithmetic number, because the mean of its divisors is an integer number (85490888455).

Almost surely, 2^{1022012220221} is an apocalyptic number.

It is an amenable number.

1022012220221 is a deficient number, since it is larger than the sum of its proper divisors (3878441239).

1022012220221 is an frugal number, since it uses more digits than its factorization.

1022012220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7024 (or 6707 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1022012220221 its reverse (1220222102201), we get a palindrome (2242234322422).

The spelling of 1022012220221 in words is "one trillion, twenty-two billion, twelve million, two hundred twenty thousand, two hundred twenty-one".