1101221999 has 8 divisors (see below), whose sum is σ = 1117680768. Its totient is φ = 1084789720.

The previous prime is 1101221987. The next prime is 1101222047. The reversal of 1101221999 is 9991221011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101221999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101221599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86864 + ... + 98730.

It is an arithmetic number, because the mean of its divisors is an integer number (139710096).

Almost surely, 2^1101221999 is an apocalyptic number.

1101221999 is a deficient number, since it is larger than the sum of its proper divisors (16458769).

1101221999 is a wasteful number, since it uses less digits than its factorization.

1101221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 1101221999 is about 33184.6651180933. The cubic root of 1101221999 is about 1032.6622301352.

The spelling of 1101221999 in words is "one billion, one hundred one million, two hundred twenty-one thousand, nine hundred ninety-nine".