20010321030021 has 32 divisors (see below), whose sum is σ = 31825499086848. Its totient is φ = 10934621343360.

The previous prime is 20010321029947. The next prime is 20010321030163. The reversal of 20010321030021 is 12003012301002.

It is not a de Polignac number, because 20010321030021 - 2²⁷ = 20010186812293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010321010021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3146365 + ... + 7065426.

It is an arithmetic number, because the mean of its divisors is an integer number (994546846464).

Almost surely, 2^{20010321030021} is an apocalyptic number.

20010321030021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20010321030021 is a deficient number, since it is larger than the sum of its proper divisors (11815178056827).

20010321030021 is a wasteful number, since it uses less digits than its factorization.

20010321030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215881.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20010321030021 its reverse (12003012301002), we get a palindrome (32013333331023).

The spelling of 20010321030021 in words is "twenty trillion, ten billion, three hundred twenty-one million, thirty thousand, twenty-one".