1122205557221 has 6 divisors (see below), whose sum is σ = 1305422791110. Its totient is φ = 961890477576.

The previous prime is 1122205557169. The next prime is 1122205557223. The reversal of 1122205557221 is 1227555022211.

It can be written as a sum of positive squares in only one way, i.e., 1122137676100 + 67881121 = 1059310^2 + 8239^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1122205557221 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 (1122205557223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11451077066 + ... + 11451077163.

It is an arithmetic number, because the mean of its divisors is an integer number (217570465185).

Almost surely, 2^{1122205557221} is an apocalyptic number.

It is an amenable number.

1122205557221 is a deficient number, since it is larger than the sum of its proper divisors (183217233889).

1122205557221 is an equidigital number, since it uses as much as digits as its factorization.

1122205557221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22902154243 (or 22902154236 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 35.

The spelling of 1122205557221 in words is "one trillion, one hundred twenty-two billion, two hundred five million, five hundred fifty-seven thousand, two hundred twenty-one".