11111221210049 has 2 divisors, whose sum is σ = 11111221210050. Its totient is φ = 11111221210048.

The previous prime is 11111221209941. The next prime is 11111221210069. The reversal of 11111221210049 is 94001212211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10967568839824 + 143652370225 = 3311732^2 + 379015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111221210049 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111221210069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610605024 + 5555610605025.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610605025).

Almost surely, 2^{11111221210049} is an apocalyptic number.

It is an amenable number.

11111221210049 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111221210049 is an equidigital number, since it uses as much as digits as its factorization.

11111221210049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 11111221210049 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, forty-nine".