21210102110001 has 16 divisors (see below), whose sum is σ = 33193673316224. Its totient is φ = 11792489203584.

The previous prime is 21210102109993. The next prime is 21210102110017. The reversal of 21210102110001 is 10001120101212.

It is not a de Polignac number, because 21210102110001 - 2³ = 21210102109993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210102118001) 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, 13648713580 + ... + 13648715133.

It is an arithmetic number, because the mean of its divisors is an integer number (2074604582264).

Almost surely, 2^{21210102110001} is an apocalyptic number.

21210102110001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21210102110001 is a deficient number, since it is larger than the sum of its proper divisors (11983571206223).

21210102110001 is a wasteful number, since it uses less digits than its factorization.

21210102110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27297428760.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21210102110001 its reverse (10001120101212), we get a palindrome (31211222211213).

The spelling of 21210102110001 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, one hundred ten thousand, one".