1201110222121 has 2 divisors, whose sum is σ = 1201110222122. Its totient is φ = 1201110222120.

The previous prime is 1201110222077. The next prime is 1201110222131. The reversal of 1201110222121 is 1212220111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157872842025 + 43237380096 = 1076045^2 + 207936^2 .

It is an emirp because it is prime and its reverse (1212220111021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201110222121 - 2³³ = 1192520287529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201110222095 and 1201110222104.

It is not a weakly prime, because it can be changed into another prime (1201110222131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555111060 + 600555111061.

It is an arithmetic number, because the mean of its divisors is an integer number (600555111061).

Almost surely, 2^{1201110222121} is an apocalyptic number.

It is an amenable number.

1201110222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201110222121 is an equidigital number, since it uses as much as digits as its factorization.

1201110222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201110222121 its reverse (1212220111021), we get a palindrome (2413330333142).

The spelling of 1201110222121 in words is "one trillion, two hundred one billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".