20121003211 has 6 divisors (see below), whose sum is σ = 21235740612. Its totient is φ = 19062002700.

The previous prime is 20121003209. The next prime is 20121003229. The reversal of 20121003211 is 11230012102.

It is not a de Polignac number, because 20121003211 - 2¹ = 20121003209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121003191 and 20121003200.

It is not an unprimeable number, because it can be changed into a prime (20121003311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27868065 + ... + 27868786.

It is an arithmetic number, because the mean of its divisors is an integer number (3539290102).

Almost surely, 2^20121003211 is an apocalyptic number.

20121003211 is a deficient number, since it is larger than the sum of its proper divisors (1114737401).

20121003211 is an equidigital number, since it uses as much as digits as its factorization.

20121003211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55736889 (or 55736870 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20121003211 its reverse (11230012102), we get a palindrome (31351015313).

The spelling of 20121003211 in words is "twenty billion, one hundred twenty-one million, three thousand, two hundred eleven".