20112201209999 has 4 divisors (see below), whose sum is σ = 20112237356880. Its totient is φ = 20112165063120.

The previous prime is 20112201209959. The next prime is 20112201210001. The reversal of 20112201209999 is 99990210221102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112201209999 is a prime.

It is a super-2 number, since 2×20112201209999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112201209959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17225579 + ... + 18356060.

It is an arithmetic number, because the mean of its divisors is an integer number (5028059339220).

Almost surely, 2^{20112201209999} is an apocalyptic number.

20112201209999 is a deficient number, since it is larger than the sum of its proper divisors (36146881).

20112201209999 is an equidigital number, since it uses as much as digits as its factorization.

20112201209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36146880.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 20112201209999 in words is "twenty trillion, one hundred twelve billion, two hundred one million, two hundred nine thousand, nine hundred ninety-nine".