1101220999 has 2 divisors, whose sum is σ = 1101221000. Its totient is φ = 1101220998.

The previous prime is 1101220993. The next prime is 1101221003. The reversal of 1101220999 is 9990221011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1101220999 - 2⁷ = 1101220871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610499 + 550610500.

It is an arithmetic number, because the mean of its divisors is an integer number (550610500).

Almost surely, 2^1101220999 is an apocalyptic number.

1101220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101220999 is an equidigital number, since it uses as much as digits as its factorization.

1101220999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 1101220999 is about 33184.6500508895. The cubic root of 1101220999 is about 1032.6619175544.

The spelling of 1101220999 in words is "one billion, one hundred one million, two hundred twenty thousand, nine hundred ninety-nine".