21100210440001 has 16 divisors (see below), whose sum is σ = 27691321973760. Its totient is φ = 15576368608080.

The previous prime is 21100210439941. The next prime is 21100210440011. The reversal of 21100210440001 is 10004401200112.

It is a happy number.

It is not a de Polignac number, because 21100210440001 - 2¹³ = 21100210431809 is a prime.

It is a super-2 number, since 2×21100210440001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100210440011) 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, 7211280301 + ... + 7211283226.

It is an arithmetic number, because the mean of its divisors is an integer number (1730707623360).

Almost surely, 2^{21100210440001} is an apocalyptic number.

It is an amenable number.

21100210440001 is a deficient number, since it is larger than the sum of its proper divisors (6591111533759).

21100210440001 is a wasteful number, since it uses less digits than its factorization.

21100210440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14422563564.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21100210440001 its reverse (10004401200112), we get a palindrome (31104611640113).

The spelling of 21100210440001 in words is "twenty-one trillion, one hundred billion, two hundred ten million, four hundred forty thousand, one".