21002121010113 has 8 divisors (see below), whose sum is σ = 28006928616000. Its totient is φ = 13999363705488.

The previous prime is 21002121010061. The next prime is 21002121010153. The reversal of 21002121010113 is 31101012120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21002121010113 - 2⁶ = 21002121010049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002121010092 and 21002121010101.

It is not an unprimeable number, because it can be changed into a prime (21002121010153) 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, 512551413 + ... + 512592386.

It is an arithmetic number, because the mean of its divisors is an integer number (3500866077000).

Almost surely, 2^{21002121010113} is an apocalyptic number.

It is an amenable number.

21002121010113 is a deficient number, since it is larger than the sum of its proper divisors (7004807605887).

21002121010113 is a wasteful number, since it uses less digits than its factorization.

21002121010113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025150631.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21002121010113 its reverse (31101012120012), we get a palindrome (52103133130125).

The spelling of 21002121010113 in words is "twenty-one trillion, two billion, one hundred twenty-one million, ten thousand, one hundred thirteen".