20111211221099 has 8 divisors (see below), whose sum is σ = 20299678479360. Its totient is φ = 19922753444776.

The previous prime is 20111211221081. The next prime is 20111211221113. The reversal of 20111211221099 is 99012211211102.

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

It is a cyclic number.

It is not a de Polignac number, because 20111211221099 - 2²⁸ = 20110942785643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111211221009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927742 + ... + 6628620.

It is an arithmetic number, because the mean of its divisors is an integer number (2537459809920).

Almost surely, 2^{20111211221099} is an apocalyptic number.

20111211221099 is a deficient number, since it is larger than the sum of its proper divisors (188467258261).

20111211221099 is a wasteful number, since it uses less digits than its factorization.

20111211221099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740969.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 20111211221099 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, ninety-nine".