1022022212221 has 16 divisors (see below), whose sum is σ = 1074421010160. Its totient is φ = 970834636800.

The previous prime is 1022022212213. The next prime is 1022022212273. The reversal of 1022022212221 is 1222122202201.

It can be written as a sum of positive squares in 8 ways, for example, as 407976012900 + 614046199321 = 638730^2 + 783611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022022212221 - 2³ = 1022022212213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022022212821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246961 + ... + 1450873.

It is an arithmetic number, because the mean of its divisors is an integer number (67151313135).

Almost surely, 2^{1022022212221} is an apocalyptic number.

It is an amenable number.

1022022212221 is a deficient number, since it is larger than the sum of its proper divisors (52398797939).

1022022212221 is a wasteful number, since it uses less digits than its factorization.

1022022212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204416.

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

Adding to 1022022212221 its reverse (1222122202201), we get a palindrome (2244144414422).

The spelling of 1022022212221 in words is "one trillion, twenty-two billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".