21100120100011 has 8 divisors (see below), whose sum is σ = 21397614822144. Its totient is φ = 20802633987240.

The previous prime is 21100120099999. The next prime is 21100120100027. The reversal of 21100120100011 is 11000102100112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100120100011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100120100611) 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, 2865780 + ... + 7100206.

It is an arithmetic number, because the mean of its divisors is an integer number (2674701852768).

Almost surely, 2^{21100120100011} is an apocalyptic number.

21100120100011 is a deficient number, since it is larger than the sum of its proper divisors (297494722133).

21100120100011 is an equidigital number, since it uses as much as digits as its factorization.

21100120100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304681.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21100120100011 its reverse (11000102100112), we get a palindrome (32100222200123).

The spelling of 21100120100011 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred thousand, eleven".