20201231211 has 8 divisors (see below), whose sum is σ = 30782828544. Its totient is φ = 11543560680.

The previous prime is 20201231209. The next prime is 20201231221. The reversal of 20201231211 is 11213210202.

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

It is not a de Polignac number, because 20201231211 - 2¹ = 20201231209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201231221) 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 7 ways as a sum of consecutive naturals, for example, 480981675 + ... + 480981716.

It is an arithmetic number, because the mean of its divisors is an integer number (3847853568).

Almost surely, 2^20201231211 is an apocalyptic number.

20201231211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20201231211 is a deficient number, since it is larger than the sum of its proper divisors (10581597333).

20201231211 is an equidigital number, since it uses as much as digits as its factorization.

20201231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961963401.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20201231211 its reverse (11213210202), we get a palindrome (31414441413).

The spelling of 20201231211 in words is "twenty billion, two hundred one million, two hundred thirty-one thousand, two hundred eleven".