21010102111001 has 8 divisors (see below), whose sum is σ = 21240282862080. Its totient is φ = 20780697687232.

The previous prime is 21010102110857. The next prime is 21010102111003. The reversal of 21010102111001 is 10011120101012.

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 21010102111001 - 2²⁶ = 21010035002137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010102111003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194027405 + ... + 194135658.

It is an arithmetic number, because the mean of its divisors is an integer number (2655035357760).

Almost surely, 2^{21010102111001} is an apocalyptic number.

It is an amenable number.

21010102111001 is a deficient number, since it is larger than the sum of its proper divisors (230180751079).

21010102111001 is a wasteful number, since it uses less digits than its factorization.

21010102111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388163655.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21010102111001 its reverse (10011120101012), we get a palindrome (31021222212013).

The spelling of 21010102111001 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred eleven thousand, one".