21110101212011 has 8 divisors (see below), whose sum is σ = 24126181626624. Its totient is φ = 18094108714920.

The previous prime is 21110101212001. The next prime is 21110101212019. The reversal of 21110101212011 is 11021210101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21110101212011 - 2³⁴ = 21092921342827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110101212019) 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 7 ways as a sum of consecutive naturals, for example, 21464045 + ... + 22425998.

It is an arithmetic number, because the mean of its divisors is an integer number (3015772703328).

Almost surely, 2^{21110101212011} is an apocalyptic number.

21110101212011 is a deficient number, since it is larger than the sum of its proper divisors (3016080414613).

21110101212011 is an equidigital number, since it uses as much as digits as its factorization.

21110101212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43958761.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110101212011 its reverse (11021210101112), we get a palindrome (32131311313123).

The spelling of 21110101212011 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, two hundred twelve thousand, eleven".