21100330006653 has 16 divisors (see below), whose sum is σ = 28894502771136. Its totient is φ = 13686531356160.

The previous prime is 21100330006633. The next prime is 21100330006663. The reversal of 21100330006653 is 35660003300112.

It is a happy number.

It is not a de Polignac number, because 21100330006653 - 2⁶ = 21100330006589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100330006653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100330006633) 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, 8178925 + ... + 10444877.

It is an arithmetic number, because the mean of its divisors is an integer number (1805906423196).

Almost surely, 2^{21100330006653} is an apocalyptic number.

It is an amenable number.

21100330006653 is a deficient number, since it is larger than the sum of its proper divisors (7794172764483).

21100330006653 is a wasteful number, since it uses less digits than its factorization.

21100330006653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349884.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 21100330006653 its reverse (35660003300112), we get a palindrome (56760333306765).

The spelling of 21100330006653 in words is "twenty-one trillion, one hundred billion, three hundred thirty million, six thousand, six hundred fifty-three".