20012101211 has 12 divisors (see below), whose sum is σ = 20974856448. Its totient is φ = 19091837424.

The previous prime is 20012101171. The next prime is 20012101247. The reversal of 20012101211 is 11210121002.

It is not a de Polignac number, because 20012101211 - 2²² = 20007906907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012101192 and 20012101201.

It is not an unprimeable number, because it can be changed into a prime (20012101261) 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 11 ways as a sum of consecutive naturals, for example, 153221 + ... + 251993.

It is an arithmetic number, because the mean of its divisors is an integer number (1747904704).

Almost surely, 2^20012101211 is an apocalyptic number.

20012101211 is a deficient number, since it is larger than the sum of its proper divisors (962755237).

20012101211 is an equidigital number, since it uses as much as digits as its factorization.

20012101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99202 (or 99179 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20012101211 its reverse (11210121002), we get a palindrome (31222222213).

The spelling of 20012101211 in words is "twenty billion, twelve million, one hundred one thousand, two hundred eleven".