1011221199999 has 96 divisors (see below), whose sum is σ = 1648434965760. Its totient is φ = 612029815488.

The previous prime is 1011221199883. The next prime is 1011221200039. The reversal of 1011221199999 is 9999911221101.

It is not a de Polignac number, because 1011221199999 - 2⁹ = 1011221199487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011221199199) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22190652 + ... + 22236174.

It is an arithmetic number, because the mean of its divisors is an integer number (17171197560).

Almost surely, 2^{1011221199999} is an apocalyptic number.

1011221199999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1011221199999 is a deficient number, since it is larger than the sum of its proper divisors (637213765761).

1011221199999 is a wasteful number, since it uses less digits than its factorization.

1011221199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45666 (or 45641 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 54.

The spelling of 1011221199999 in words is "one trillion, eleven billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred ninety-nine".