21010010011001 has 16 divisors (see below), whose sum is σ = 24714774302400. Its totient is φ = 17653410201600.

The previous prime is 21010010010973. The next prime is 21010010011033. The reversal of 21010010011001 is 10011001001012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21010010011001 - 2²² = 21010005816697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010010011001.

It is not an unprimeable number, because it can be changed into a prime (21010010011061) 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, 1225922696 + ... + 1225939833.

It is an arithmetic number, because the mean of its divisors is an integer number (1544673393900).

Almost surely, 2^{21010010011001} is an apocalyptic number.

It is an amenable number.

21010010011001 is a deficient number, since it is larger than the sum of its proper divisors (3704764291399).

21010010011001 is a wasteful number, since it uses less digits than its factorization.

21010010011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451862600.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21010010011001 its reverse (10011001001012), we get a palindrome (31021011012013).

The spelling of 21010010011001 in words is "twenty-one trillion, ten billion, ten million, eleven thousand, one".