11111221010993 has 2 divisors, whose sum is σ = 11111221010994. Its totient is φ = 11111221010992.

The previous prime is 11111221010983. The next prime is 11111221011013. The reversal of 11111221010993 is 39901012211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9690221119744 + 1420999891249 = 3112912^2 + 1192057^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111221010993 - 2²⁶ = 11111153902129 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111221010983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610505496 + 5555610505497.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610505497).

Almost surely, 2^{11111221010993} is an apocalyptic number.

It is an amenable number.

11111221010993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111221010993 is an equidigital number, since it uses as much as digits as its factorization.

11111221010993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 32.

The spelling of 11111221010993 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, ten thousand, nine hundred ninety-three".