21120330120101 has 4 divisors (see below), whose sum is σ = 21140198728992. Its totient is φ = 21100461511212.

The previous prime is 21120330120079. The next prime is 21120330120103. The reversal of 21120330120101 is 10102103302112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120330120101 is a prime.

It is a super-3 number, since 3×21120330120101³ (a number of 41 digits) contains 333 as substring.

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 21120330120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120330120103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9934302851 + ... + 9934304976.

It is an arithmetic number, because the mean of its divisors is an integer number (5285049682248).

Almost surely, 2^{21120330120101} is an apocalyptic number.

It is an amenable number.

21120330120101 is a deficient number, since it is larger than the sum of its proper divisors (19868608891).

21120330120101 is a wasteful number, since it uses less digits than its factorization.

21120330120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19868608890.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21120330120101 its reverse (10102103302112), we get a palindrome (31222433422213).

The spelling of 21120330120101 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty million, one hundred twenty thousand, one hundred one".