21201110110008 has 96 divisors (see below), whose sum is σ = 58828695176160. Its totient is φ = 6895670906880.

The previous prime is 21201110110007. The next prime is 21201110110009. The reversal of 21201110110008 is 80001101110212.

It is an interprime number because it is at equal distance from previous prime (21201110110007) and next prime (21201110110009).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201110110007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20882085 + ... + 21873812.

It is an arithmetic number, because the mean of its divisors is an integer number (612798908085).

Almost surely, 2^{21201110110008} is an apocalyptic number.

It is an amenable number.

21201110110008 is an abundant number, since it is smaller than the sum of its proper divisors (37627585066152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201110110008 is a wasteful number, since it uses less digits than its factorization.

21201110110008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42756077 (or 42756070 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The spelling of 21201110110008 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred ten thousand, eight".