20211131219999 has 16 divisors (see below), whose sum is σ = 21561978785760. Its totient is φ = 18890343360000.

The previous prime is 20211131219969. The next prime is 20211131220001. The reversal of 20211131219999 is 99991213111202.

It is a cyclic number.

It is not a de Polignac number, because 20211131219999 - 2²⁸ = 20210862784543 is a prime.

It is a super-2 number, since 2×20211131219999² (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 (20211131219969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18201182 + ... + 19279659.

It is an arithmetic number, because the mean of its divisors is an integer number (1347623674110).

Almost surely, 2^{20211131219999} is an apocalyptic number.

20211131219999 is a deficient number, since it is larger than the sum of its proper divisors (1350847565761).

20211131219999 is a wasteful number, since it uses less digits than its factorization.

20211131219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37481242.

The product of its (nonzero) digits is 157464, while the sum is 50.

The spelling of 20211131219999 in words is "twenty trillion, two hundred eleven billion, one hundred thirty-one million, two hundred nineteen thousand, nine hundred ninety-nine".