20110101001211 has 16 divisors (see below), whose sum is σ = 21819522820704. Its totient is φ = 18423946969344.

The previous prime is 20110101001183. The next prime is 20110101001217. The reversal of 20110101001211 is 11210010101102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110101001211 is a prime.

It is a super-3 number, since 3×20110101001211³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110101001192 and 20110101001201.

It is not an unprimeable number, because it can be changed into a prime (20110101001217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7689476 + ... + 9967358.

It is an arithmetic number, because the mean of its divisors is an integer number (1363720176294).

Almost surely, 2^{20110101001211} is an apocalyptic number.

20110101001211 is a deficient number, since it is larger than the sum of its proper divisors (1709421819493).

20110101001211 is a wasteful number, since it uses less digits than its factorization.

20110101001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282990.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20110101001211 its reverse (11210010101102), we get a palindrome (31320111102313).

The spelling of 20110101001211 in words is "twenty trillion, one hundred ten billion, one hundred one million, one thousand, two hundred eleven".