20031211199999 has 8 divisors (see below), whose sum is σ = 20057448050640. Its totient is φ = 20004981025216.

The previous prime is 20031211199971. The next prime is 20031211200109. The reversal of 20031211199999 is 99999111213002.

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 20031211199999 - 2²⁴ = 20031194422783 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 (20031211199969) 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, 4350257 + ... + 7680309.

It is an arithmetic number, because the mean of its divisors is an integer number (2507181006330).

Almost surely, 2^{20031211199999} is an apocalyptic number.

20031211199999 is a deficient number, since it is larger than the sum of its proper divisors (26236850641).

20031211199999 is an equidigital number, since it uses as much as digits as its factorization.

20031211199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337929.

The product of its (nonzero) digits is 708588, while the sum is 56.

The spelling of 20031211199999 in words is "twenty trillion, thirty-one billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred ninety-nine".