21120020113021 has 8 divisors (see below), whose sum is σ = 21644161056000. Its totient is φ = 20596308622560.

The previous prime is 21120020113019. The next prime is 21120020113057. The reversal of 21120020113021 is 12031102002112.

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 21120020113021 - 2¹ = 21120020113019 is a prime.

It is a super-2 number, since 2×21120020113021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120020112986 and 21120020113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120020113001) 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, 107263551 + ... + 107460268.

It is an arithmetic number, because the mean of its divisors is an integer number (2705520132000).

Almost surely, 2^{21120020113021} is an apocalyptic number.

It is an amenable number.

21120020113021 is a deficient number, since it is larger than the sum of its proper divisors (524140942979).

21120020113021 is a wasteful number, since it uses less digits than its factorization.

21120020113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214726259.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21120020113021 its reverse (12031102002112), we get a palindrome (33151122115133).

The spelling of 21120020113021 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred thirteen thousand, twenty-one".