1122220021121 has 4 divisors (see below), whose sum is σ = 1122254358852. Its totient is φ = 1122185683392.

The previous prime is 1122220021079. The next prime is 1122220021127. The reversal of 1122220021121 is 1211200222211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 819588006721 + 302632014400 = 905311^2 + 550120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122220021121 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 1122220021121.

It is not an unprimeable number, because it can be changed into a prime (1122220021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17119796 + ... + 17185221.

It is an arithmetic number, because the mean of its divisors is an integer number (280563589713).

Almost surely, 2^{1122220021121} is an apocalyptic number.

It is an amenable number.

1122220021121 is a deficient number, since it is larger than the sum of its proper divisors (34337731).

1122220021121 is an equidigital number, since it uses as much as digits as its factorization.

1122220021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34337730.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1122220021121 its reverse (1211200222211), we get a palindrome (2333420243332).

The spelling of 1122220021121 in words is "one trillion, one hundred twenty-two billion, two hundred twenty million, twenty-one thousand, one hundred twenty-one".