21020100120011 has 8 divisors (see below), whose sum is σ = 21286261017600. Its totient is φ = 20753941314600.

The previous prime is 21020100120007. The next prime is 21020100120053. The reversal of 21020100120011 is 11002100102012.

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

It is a cyclic number.

It is not a de Polignac number, because 21020100120011 - 2² = 21020100120007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020100119974 and 21020100120001.

It is not an unprimeable number, because it can be changed into a prime (21020100110011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34190750 + ... + 34800108.

It is an arithmetic number, because the mean of its divisors is an integer number (2660782627200).

Almost surely, 2^{21020100120011} is an apocalyptic number.

21020100120011 is a deficient number, since it is larger than the sum of its proper divisors (266160897589).

21020100120011 is an equidigital number, since it uses as much as digits as its factorization.

21020100120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046089.

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

Adding to 21020100120011 its reverse (11002100102012), we get a palindrome (32022200222023).

The spelling of 21020100120011 in words is "twenty-one trillion, twenty billion, one hundred million, one hundred twenty thousand, eleven".