20110021210021 has 8 divisors (see below), whose sum is σ = 20515382828640. Its totient is φ = 19706810051568.

The previous prime is 20110021209973. The next prime is 20110021210039. The reversal of 20110021210021 is 12001212001102.

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 20110021210021 - 2⁷ = 20110021209893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110021209983 and 20110021210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110021210921) 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, 537596151 + ... + 537633556.

It is an arithmetic number, because the mean of its divisors is an integer number (2564422853580).

Almost surely, 2^{20110021210021} is an apocalyptic number.

It is an amenable number.

20110021210021 is a deficient number, since it is larger than the sum of its proper divisors (405361618619).

20110021210021 is a wasteful number, since it uses less digits than its factorization.

20110021210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075230083.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20110021210021 its reverse (12001212001102), we get a palindrome (32111233211123).

The spelling of 20110021210021 in words is "twenty trillion, one hundred ten billion, twenty-one million, two hundred ten thousand, twenty-one".