20102011211 has 4 divisors (see below), whose sum is σ = 20141975952. Its totient is φ = 20062046472.

The previous prime is 20102011207. The next prime is 20102011217. The reversal of 20102011211 is 11211020102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102011211 - 2² = 20102011207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102011192 and 20102011201.

It is not an unprimeable number, because it can be changed into a prime (20102011217) 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 3 ways as a sum of consecutive naturals, for example, 19981616 + ... + 19982621.

It is an arithmetic number, because the mean of its divisors is an integer number (5035493988).

Almost surely, 2^20102011211 is an apocalyptic number.

20102011211 is a deficient number, since it is larger than the sum of its proper divisors (39964741).

20102011211 is an equidigital number, since it uses as much as digits as its factorization.

20102011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39964740.

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

Adding to 20102011211 its reverse (11211020102), we get a palindrome (31313031313).

The spelling of 20102011211 in words is "twenty billion, one hundred two million, eleven thousand, two hundred eleven".