20211099199999 has 2 divisors, whose sum is σ = 20211099200000. Its totient is φ = 20211099199998.

The previous prime is 20211099199987. The next prime is 20211099200009. The reversal of 20211099199999 is 99999199011202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211099199999 - 2¹³ = 20211099191807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211099199399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105549599999 + 10105549600000.

It is an arithmetic number, because the mean of its divisors is an integer number (10105549600000).

Almost surely, 2^{20211099199999} is an apocalyptic number.

20211099199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211099199999 is an equidigital number, since it uses as much as digits as its factorization.

20211099199999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19131876, while the sum is 70.

The spelling of 20211099199999 in words is "twenty trillion, two hundred eleven billion, ninety-nine million, one hundred ninety-nine thousand, nine hundred ninety-nine".