1122222020221 has 16 divisors (see below), whose sum is σ = 1192698226800. Its totient is φ = 1052248965120.

The previous prime is 1122222020209. The next prime is 1122222020233. The reversal of 1122222020221 is 1220202222211.

It is an interprime number because it is at equal distance from previous prime (1122222020209) and next prime (1122222020233).

It can be written as a sum of positive squares in 8 ways, for example, as 244046868121 + 878175152100 = 494011^2 + 937110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122222020221 - 2¹⁹ = 1122221495933 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 (1122222020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4867255 + ... + 5092603.

It is an arithmetic number, because the mean of its divisors is an integer number (74543639175).

Almost surely, 2^{1122222020221} is an apocalyptic number.

It is an amenable number.

1122222020221 is a deficient number, since it is larger than the sum of its proper divisors (70476206579).

1122222020221 is a wasteful number, since it uses less digits than its factorization.

1122222020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226464.

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

Adding to 1122222020221 its reverse (1220202222211), we get a palindrome (2342424242432).

The spelling of 1122222020221 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty thousand, two hundred twenty-one".