11231221021099 has 2 divisors, whose sum is σ = 11231221021100. Its totient is φ = 11231221021098.

The previous prime is 11231221021067. The next prime is 11231221021127. The reversal of 11231221021099 is 99012012213211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11231221021099 - 2⁵ = 11231221021067 is a prime.

It is a super-2 number, since 2×11231221021099² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11231221021199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615610510549 + 5615610510550.

It is an arithmetic number, because the mean of its divisors is an integer number (5615610510550).

Almost surely, 2^{11231221021099} is an apocalyptic number.

11231221021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231221021099 is an equidigital number, since it uses as much as digits as its factorization.

11231221021099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 11231221021099 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, twenty-one thousand, ninety-nine".