21010111110001 has 8 divisors (see below), whose sum is σ = 23817130003520. Its totient is φ = 18373214573712.

The previous prime is 21010111109983. The next prime is 21010111110091. The reversal of 21010111110001 is 10001111101012.

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 21010111110001 - 2⁵ = 21010111109969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21010111110001.

It is not an unprimeable number, because it can be changed into a prime (21010111110091) 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, 42530589045 + ... + 42530589538.

It is an arithmetic number, because the mean of its divisors is an integer number (2977141250440).

Almost surely, 2^{21010111110001} is an apocalyptic number.

It is an amenable number.

21010111110001 is a deficient number, since it is larger than the sum of its proper divisors (2807018893519).

21010111110001 is a wasteful number, since it uses less digits than its factorization.

21010111110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85061178615.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21010111110001 its reverse (10001111101012), we get a palindrome (31011222211013).

The spelling of 21010111110001 in words is "twenty-one trillion, ten billion, one hundred eleven million, one hundred ten thousand, one".