20101001211 has 12 divisors (see below), whose sum is σ = 29819503792. Its totient is φ = 13038487056.

The previous prime is 20101001209. The next prime is 20101001257. The reversal of 20101001211 is 11210010102.

It is a happy number.

It is not a de Polignac number, because 20101001211 - 2¹ = 20101001209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101001193 and 20101001202.

It is not an unprimeable number, because it can be changed into a prime (20101001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30181351 + ... + 30182016.

Almost surely, 2^20101001211 is an apocalyptic number.

20101001211 is a deficient number, since it is larger than the sum of its proper divisors (9718502581).

20101001211 is a wasteful number, since it uses less digits than its factorization.

20101001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60363410 (or 60363407 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20101001211 its reverse (11210010102), we get a palindrome (31311011313).

The spelling of 20101001211 in words is "twenty billion, one hundred one million, one thousand, two hundred eleven".