11221220121047 has 2 divisors, whose sum is σ = 11221220121048. Its totient is φ = 11221220121046.

The previous prime is 11221220120987. The next prime is 11221220121179. The reversal of 11221220121047 is 74012102212211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221220121047 - 2¹⁰ = 11221220120023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221220121247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610060523 + 5610610060524.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610060524).

Almost surely, 2^{11221220121047} is an apocalyptic number.

11221220121047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221220121047 is an equidigital number, since it uses as much as digits as its factorization.

11221220121047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 11221220121047 its reverse (74012102212211), we get a palindrome (85233322333258).

The spelling of 11221220121047 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, forty-seven".