1122100001221 has 4 divisors (see below), whose sum is σ = 1124555362732. Its totient is φ = 1119644639712.

The previous prime is 1122100001213. The next prime is 1122100001227. The reversal of 1122100001221 is 1221000012211.

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 1057082141025 + 65017860196 = 1028145^2 + 254986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122100001221 - 2³ = 1122100001213 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 (1122100001227) 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 3 ways as a sum of consecutive naturals, for example, 1227680070 + ... + 1227680983.

It is an arithmetic number, because the mean of its divisors is an integer number (281138840683).

Almost surely, 2^{1122100001221} is an apocalyptic number.

It is an amenable number.

1122100001221 is a deficient number, since it is larger than the sum of its proper divisors (2455361511).

1122100001221 is an equidigital number, since it uses as much as digits as its factorization.

1122100001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455361510.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1122100001221 its reverse (1221000012211), we get a palindrome (2343100013432).

The spelling of 1122100001221 in words is "one trillion, one hundred twenty-two billion, one hundred million, one thousand, two hundred twenty-one".