20101020211 has 4 divisors (see below), whose sum is σ = 20112853000. Its totient is φ = 20089187424.

The previous prime is 20101020139. The next prime is 20101020257. The reversal of 20101020211 is 11202010102.

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 20101020211 - 2⁷ = 20101020083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101020271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5913846 + ... + 5917243.

It is an arithmetic number, because the mean of its divisors is an integer number (5028213250).

Almost surely, 2^20101020211 is an apocalyptic number.

20101020211 is a deficient number, since it is larger than the sum of its proper divisors (11832789).

20101020211 is a wasteful number, since it uses less digits than its factorization.

20101020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11832788.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101020211 its reverse (11202010102), we get a palindrome (31303030313).

The spelling of 20101020211 in words is "twenty billion, one hundred one million, twenty thousand, two hundred eleven".