20011002210221 has 16 divisors (see below), whose sum is σ = 22188753275328. Its totient is φ = 17893031395200.

The previous prime is 20011002210209. The next prime is 20011002210239. The reversal of 20011002210221 is 12201220011002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011002210221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011002210196 and 20011002210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011002210421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21682241 + ... + 22586313.

It is an arithmetic number, because the mean of its divisors is an integer number (1386797079708).

Almost surely, 2^{20011002210221} is an apocalyptic number.

It is an amenable number.

20011002210221 is a deficient number, since it is larger than the sum of its proper divisors (2177751065107).

20011002210221 is a wasteful number, since it uses less digits than its factorization.

20011002210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937132.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20011002210221 its reverse (12201220011002), we get a palindrome (32212222221223).

The spelling of 20011002210221 in words is "twenty trillion, eleven billion, two million, two hundred ten thousand, two hundred twenty-one".