1211101099999 has 8 divisors (see below), whose sum is σ = 1384251415200. Its totient is φ = 1037984752896.

The previous prime is 1211101099997. The next prime is 1211101100029. The reversal of 1211101099999 is 9999901011121.

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

It is not a de Polignac number, because 1211101099999 - 2¹ = 1211101099997 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 (1211101099997) 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, 8415574 + ... + 8558275.

It is an arithmetic number, because the mean of its divisors is an integer number (173031426900).

Almost surely, 2^{1211101099999} is an apocalyptic number.

1211101099999 is a deficient number, since it is larger than the sum of its proper divisors (173150315201).

1211101099999 is a wasteful number, since it uses less digits than its factorization.

1211101099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16984049.

The product of its (nonzero) digits is 118098, while the sum is 52.

The spelling of 1211101099999 in words is "one trillion, two hundred eleven billion, one hundred one million, ninety-nine thousand, nine hundred ninety-nine".